Who'd You Rather?

Rob Lowe, 46, Jeremy Piven, 45, and Thomas Jane, 41, joined forces to promote their new flick "I Melt With You" at the Sundance Film Festival on Wednesday.

Former actresses Mischa Barton, 25, and Tara Reid, 35, roamed around Moscow and Paris respectively on Tuesday.

Teen pop stars of yore, Tiffany, 39, and Debbie Gibson, 40, showed off their electric youth at the premiere of their new cable TV movie "Mega Python vs. Gatoroid" in NYC on Monday.

"The Roommate" beauties Minka Kelly and Leighton Meester got friendly at the film's premiere in L.A. on Sunday.

"Social Network" stars Armie Hammer and Justin Timberlake both attended the Producers Guild Awards in Beverly Hills last night.

Television actresses of yore, "Police Woman" Angie Dickinson, 79, "Star Trek" babe Nichelle Nichols, 78, "Hart to Hart" beauty Stefanie Powers, 68, and "Dynasty" stunner Linda Evans, 68, all got back into the spotlight at an event in NYC this week.

During last night's "American Idol" auditions, Randy Jackson, 54, wannabe Jovanny Barreto, 23, and Steven Tyler, 62, gave J.Lo a peek of their rippling man abs.

Last night's "American Idol" premiere made us wonder if Paula Abdul and Simon Cowell were missed or did Jennifer Lopez and Steven Tyler up the show's game?

Joe Jonas' ex Camilla Belle, 24, and "Spy Kids" star Alexa Vega, 22, made nice at the L.A. premiere of their new movie "From Prada to Nada" on Tuesday.

It was a red dress fashion battle at the Golden Globes for "Mad Men" stars January Jones and Christina Hendricks.

"Big Love" ladies Ginnifer Goodwin, 32, Jeanne Tripplehorn, 47, and Chloe Sevigny, 36, came together like one big happy family at the show's premiere in L.A. on Wednesday.

Kim Kardashian tweeted a pic of herself in full face makeup and a bikini, while older sis Kourtney didn't want to be outdone and flaunted her post-pregnancy bikini body in Miami on Friday.

Hollywood hunks Ben Affleck, 38, and Christian Bale, 36, showed off their burlier sides at the same event in NY on Tuesday.

Ed Norton, 41, played Bruce Banner in the 2008 film "The Incredible Hulk" and Mark Ruffalo, 43, will play the green superhero in the upcoming 2012 blockbuster "The Avengers."

Former "Beverly Hills, 90210" high school students, Jason Priestly, 41, and Luke Perry, 44, reunited at the same event in L.A. the other day.

Former supermodels Rachel Hunter, 41, and Niki Taylor, 35, compared beauty secrets at the same event in West Hollywood last night.