Hugh Hefner just turned 84, but he's still the ultimate party boy.
Hef celebrated his birthday on Saturday in Las Vegas at the Palms Casino Resort with dinner at N9NE Steakhouse followed by late-night good times at the Playboy Club. Joining Hefner was girlfriend Crystal Harris, Mad Men star Bryan Batt, Jaime Pressly and hubby Simran Singh and, of course, Holly Madison.
GETTING NAILED: Renée Zellweger, getting a mani-pedi at Nail Garden in Studio City.
JUST BEACHY: Mya, hanging out at Rock Media's Elle magazine party in Miami Beach.
RAY OF LIGHT: Real Housewives of New York City star Kelly Bensimon, checking out the clarifying light therapy at TRIA Beauty Blue Lounge in NYC.
UNDER THE RADAR: An almost unrecognizable Nikki Reed, hanging out incognito with a gal-pal at the Tea Room in Hollywood, where she rocked eyeglasses, jeans and had her hair up in a bun.
HAIRY SITUATION: Kim Kardashian, getting a laser hair removal treatment at LaserAway in West Hollywood.
MOMMY AND ME: Jessica Alba, lunching with daughter Honor at Coral Tree Café in L.A.'s Brentwood, where she generously tipped the waiter and valet.
—Additional reporting by Lindsay Miller