Katy Perry Has Another Famous Friend! Is She the Most Popular Girl in Hollywood?

The Grammy nominee is taking Girls star Allison Williams to the awards show this weekend. What will her many other BFFs think?!

Is Katy Perry friends with every cool girl in Hollywood?

It turns out that the pop star is ditching boyfriend John Mayer this weekend and taking Girls star Allison Williams as her date to the Grammys on Sunday.

"I am going to the Grammys and Katy Perry is my date," Williams told Anderson Cooper on Anderson Live. "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."

If you're wondering how these two know one another, it's reported that Mayer is close with Williams' boyfriend, College Humor founder Ricky Van Veen. They've apparently already double dated a bit, which explains why Williams and Perry seem so close.

Of course Brian Williams' daughter isn't the only famous lady who Perry has on her speed dial. She's been longtime BFFs with Rihanna, who planned her Las Vegas bachelorette party in 2010. Miley Cyrus got intense talking about their friendship in Cosmopolitan last month. And she's so close with Raising Hope star Shannon Woodward that she did a guest appearance on her show!

So why do so many people seem to love Perry? We can think of a few reasons: She seems fun, wild and carefree, while still being incredibly genuine and loyal. Plus, she and Andy Samberg already proved why Perry's an awesome best friend during her stint on Saturday Night Live. (We've been jealous of everyone who gets to hang out with her since!)

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