I had no idea who this clown was with the leftover Christmas decoration on her head, so I had to look her up. Turns out she's famous for being Stanley Kramer's daughter. Since I didn't know who he was, I had to look him up. Turns out he's famous for directing a few movies that some believe he didn't actually direct. A quick look at IMDB shows Kat Kramer is Katherine Hepburn's goddaughter and loves "Grease," Russell Crowe and singing Rolling Stone covers.
It's obvious from Kat Kramer's Website that she is simply one of those people who really, really wants to be famous. So she got invited to the Grammys and she made herself up to be a big red carpet joke so she might end up on someone's Worst Dressed list, possibly thrusting herself into the spotlight for her 20 minutes of fame.