Um .... Nicki Minaj, that is! We're lovin' Miley Cyrus' sense of humor. Sexy yellow 'do!

And check out Miley Cyrus' sister Brandi and their mom Tish as Joan Jett in the pic below.

Miley's sexy sibling showed up to The Roosevelt Hotel in Hollywood for a party at Beacher's Madhouse.


We love how the Cyrus' have the Halloween spirt!