Swift's rep, Tree Paine, tells PerezHilton.com:
Wow. Wow. Wow.
Kanye is straight-up INSANE!!!!!
Let's hope New Year's Eve wasn't all a blur for Katy Perry!
She did ring in the new year with John Mayer in Vegas after all!
But before the new year started, Katy ended 2013 with one last performance at Caesar's Palace in Sin City and then went off to partay her way into 2014 with her boytoy at a private party!
If I forget to tell you Happy New Year just know I had a really great time tonight!
— Katy Perry (@katyperry) January 1, 2014
Hmm, we wonder what happened behind closed doors on Tuesday night!!
Did the prismatic singer wake up in Vegas with Johnny's class ring on her hand?
LOLz! That's probably wishful thinking, but srsly John, when are you gonna put a ring on it?!
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[Image via John Mayer/Tumblr.]