She’s keeping plenty busy since breaking up with her boyfriend of nine months, Benji Madden.  And last night Paris Hilton played hostess to the Pussycat Dolls as they took over the Viper Room.

The “Simple Life” cutie arrived on the red carpet looking hot and sexy in a shiny black vinyl dominatrix-style getup complete with black shin guards, black heels, and a black leather motorcycle hat.

On her way inside, one of Paris’ uber-expensive earrings accidentally fell off, only to be returned by a friendly paparazzo as she made her exit later on.

Earlier in the night, Miss Hilton joined a host of A-list celebrities over at the Nokia Theater for the 2008 American Music Awards.