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Katy Perry, Allison Williams.

This Sunday is officially going to be a "Girls" night for Katy Perry. The Grammy-nominated singer has decided to leave her man John Mayer at home and instead take her gal-pal and HBO star Allison Williams to the 2013 Grammy Awards this weekend (hopefully her grandma doesn't get too jealous).

"I am going to the Grammys and Katy Perry is my date," Williams told Anderson Cooper during his "Anderson Live" Thursday. "She's the hottest date. She's a friend of mine and she's nominated as she should be. I can't wait to go. Obviously she's awesome. She's the best." 

John Mayer says he was "just a jerk" in past relationships

These new BFFs met just a few months ago through their boyfriends -- Williams has been dating College Humor founder Ricky Van Veen since the spring of 2011 -- and have been spotted out together on double dates.

So what will Mayer do without his main lady? Maybe some more observing of his past ways?

The crooner told "CBS Sunday Morning's" Anthony Mason in an interview (airing this Sunday), "I was just a jerk," in regards to his past relationships.

"It's very liberating when you finally realize it's impossible to make everyone like you," Mayer said, adding, "I wanted everybody to like me. I thought I was one shuck and jive away in every direction."

Look at John Mayer growing up right in front of our eyes.

Make sure you download these songs before the Grammys!

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John Mayer -- with new love Katy Perry -- says he "was just a jerk" in his past relationships.

We're guessing John Mayer's' kiss-and-tell days are over. In a forthcoming interview with "CBS Sunday Morning," the "Clarity" singer and Katy Perry's new beau reflects harshly on his well-earned rep as a Hollywood heartbreaker who notoriously spills to the press about his breakups. 

"I was just a jerk," the 35-year-old Mayer tells host Anthony Mason. 

The blues rocker notes that he's changed since the days of his past interviews -- like that infamous 2010 Playboy sit-down when he compared former ladylove Jessica Simpson to "sexual napalm" and offered up TMI comments about ex Jennifer Aniston. 

John Mayer: Jessica Simpson was "sexual napalm!" 

"It's very liberating when you finally realize it's impossible to make everyone like you," Mayer said, adding, "I wanted everybody to like me. I thought I was one shuck and jive away in every direction." 

The Grammy winner, who was forced off the road last year for 10 months so he could recover from vocal cord surgery, confessed that getting over the negative reaction resulting from his media interviews was a lot harder than dealing with the reoccurring granuloma that nearly robbed him of his voice. 

Time to take a look at the many lusts of John Mayer 

Before hooking up with the "Firework" crooner, Mayer was also linked in the past to the likes of Jennifer Love Hewitt, Minka Kelly and Taylor Swift, the last of whom gave the singer-songwriter a taste of his own medicine by seemingly writing about their relationship in her hit "Dear John." 

The full interview with Mayer airs Feb. 10 on CBS "Sunday Morning" at 9 a.m.

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Talk about hot and cold. After a couple months of casual dating, John Mayer and Katy Perry have split, multiple sources confirm to Us Weekly.

Photos from Us: Katy Perry's many video looks

"She's really upset about it," one insider tells Us.

Echoes another insider: "She is making it seem like it wasn't serious with John, but she is hurt."

Us Weekly first reported the budding romance, with Perry, 27, and Mayer, 34, making an "affectionate" appearance together at Soho House in West Hollywood June 19.

Photos from Us: Katy and Russell Brand

At a Beverly Hills pool party Aug. 4, recently divorced Perry and notorious Lothario Mayer "were all over each other, making out," one observer said.

A pal said earlier this month that the "Teenage Dream" singer was ready to get serious with Mayer. "She doesn't want to get her heart broken again, but she feels a real connection and wants to see where things go" with Mayer, whose exes include Jennifer Love Hewitt, Jessica Simpson and Jennifer Aniston.

Photos from Us: John Mayer and Jen Aniston

Perry divorced Russell Brand earlier this year, and briefly dated Florence + the Machine rocker Robert Ackroyd in the spring.

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Millions have used "Draw Something" to play a game, but design studio head Jimmy Thompson had a different idea -- he would turn a series of "Draw" sketches into an animated video for John Mayer's "Queen of California." And Mayer approves.

"A must-see. So great," said the musician, posting on his Tumblr blog. 

The video features some simple and some intricate drawings that help illustrate the song, and it's visually addicting. 

"There is something really charming about the medium -- the strokes -- and I love the anticipation when you watch someone’s drawing being revealed," Thompson, founder of Brainbowinc, told Mashable. "I thought ("Draw Something" would) be a good match for a song with a lot of nouns."

As Mashable noted, Brainbowinc has worked with Mayer's label Columbia Records before, but they weren't involved in his creating the video. Nor is Mayer the first artist to get the "Draw Something" treatment -- singer/songwriter Isaac Simons asked fans to contribute artwork from the game for his "Call to Arms" video in March.  

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Jason Szenes / EPA

In happier times: John Mayer performing on stage with Taylor Swift in 2009.

John Mayer says that he was "really humiliated" by Taylor Swift's song "Dear John," which the country-pop star allegedly wrote about him. "It made me feel terrible," Mayer says in the new issue of Rolling Stone, on newsstands Friday. "Because I didn't deserve it. I'm pretty good at taking accountability now, and I never did anything to deserve that. It was a really lousy thing for her to do."

Swift's song, which appeared on her best-selling 2010 album "Speak Now," was released shortly after Mayer went on a two-year hiatus following his controversial interviews with Rolling Stone and Playboy. "Dear John, I see it all, now it was wrong / Don't you think 19 is too young to be played by your dark twisted games, when I loved you so?" Swift sings on the tune, a staple of her live set.

John Mayer says new album will have 'Organic, cowboy guitar sounds'

Swift and Mayer were romantically linked before the song's release, and in an interview conducted shortly after, the singer indicated that the song's subject would be apparent. "There are things that were little nuances of the relationship, little hints," said Swift. "Everyone will know, so I don't really have to send out emails on this one."

Mayer now tells Rolling Stone that he learned about Swift's feelings directly from her song. "I never got an e-mail. I never got a phone call," he says. "I was really caught off-guard, and it really humiliated me at a time when I'd already been dressed down. I mean, how would you feel if, at the lowest you've ever been, someone kicked you even lower?" When asked about the song's line, "Don't you think I was too young to be messed with?" Mayer says, "I don't want to go into that."

John Mayer's dirty mind and lonely heart

Mayer also takes issue with "Dear John" as a musician. "I will say as a songwriter that I think it's kind of cheap songwriting," he says. "I know she's the biggest thing in the world, and I'm not trying to sink anybody's ship, but I think it's abusing your talent to rub your hands together and go, 'Wait 'til he gets a load of this!' That's (expletive)."

Do you think John Mayer's reaction is justified? Share your thoughts on our Facebook page.

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Danny Moloshok / Reuters file

Jennifer Anniston and John Mayer

For John Mayer, hindsight is definitely 20/20.

Two years after he seemed to go off the TMI deep end with comments he made about ex-girlfriends Jessica Simpson and Jennifer Aniston, the singer reveals he now regrets his remarks.

MORE: John Mayer's granuloma returns, singer taking "indefinite break from live performing"

"I had nothing to say," Mayer admitted Saturday on the NPR show "All Things Considered." "I was going through a time in my life where I didn't really want to share what was going on, but I didn't want to be boring."

The Grammy winner was referring to a pair of 2010 interviews he gave to Rolling Stone and Playboy.

Mayer had told Rolling Stone at the time he had "never really gotten over" his split with Aniston, adding "it was one of the worst times" of his life.

But it was no doubt the quotes he gave to Playboy regarding his relationship with Simpson that caused many folks to change their opinion about the guy.

"Yeah, that girl is like crack cocaine to me. Sexually it was crazy," he shared with the lad mag while talking about the now-new mom. "That's all I'll say. It was like napalm, sexual napalm."

Regarding such comments, Mayer told NPR: "When you're just open, but not honest, then you start free-associating garbage. It doesn't mean I can go back and scrub it out, but I understand it now."

PHOTOS: The many lusts of John Mayer

Meanwhile, Mayer's new album "Born and Raised," is due out Tuesday, May 22.

Are you surprised to learn the singer-songwriter has had a change of heart about his tell-all ways? Share your thoughts on our Facebook page.

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