Paris Hilton sang happy birthday at a party held for 80 year-old Playboy mogul Hugh Hefner. She wore a bra, panties and garters and exhibited a surprisingly good singing voice. Hef was also feted by Donald Trump, Three-6 Mafia, Jenna Jameson, Bill Maher, and Oliver Stone.

Here’s the video of Paris singing to Hef and some photos of Paris and her mom Kathy at the LA Lakers “3rd annual Mirage Las Vegas Casino Night and Bodog Celebrity Poker Invitational” benefit on April 12, 2006 in Santa Monica, California. She certainly likes to suck on things.

Pictures [via]