Who'd You Rather?

Christina Aguilera and Kim Kardashian enjoyed a little female bonding at Xtina's record release party at Avenue in NYC last night.

Solo singers Keith Urban, 42, and John Mayer, 32, dueted during rehearsals for the CMT Awards in Nashville on Wednesday.

"Jersey Shore" socialites Snooki & Jwoww had a smirk-off with biological sisters Paris & Nicky Hilton at an MTV Movie Awards after party in Hollywood on Sunday.

Ashton Kutcher's wife Demi Moore, 47, and his "Killers" co-star Katherine Heigl, 31, canoodled at the same event in Hollywood on Tuesday.

Broadway/"30 Rock" star Cheyenne Jackson and pop star Ricky Martin were out and proud at the same event in NYC last night.

In the next "Transformers" pic, Megan Fox will be replaced by Victoria's Secret catwalker Rosie Huntington-Whiteley.

NBC hosts Brian Williams, 51, and Jimmy Fallon, 35, shared the spotlight at the same event in NYC on Thursday.

Music moguls Dr. Dre, 45, and Diddy, 40, united at an event in NYC on Wednesday.

Actresses Jodie Foster, 47, and Cynthia Nixon, 44, joined forces at a Women in Film & Television event in NYC on Tuesday.

Biological sisters Ashlee Simpson-Wentz, 25, and Jessica Simpson, 29, enjoyed some family bonding time on the red carpet of a West Hollywood event last night.

Classic '70s TV sitcom actresses Valerie "Rhoda" Harper, 70, and Linda "Alice" Lavin, 72, reunited at an event in NYC this weekend.

The '80s TV series "MacGyver" starring Richard Dean Anderson is the inspiration for the "SNL" skit turned 2010 film "MacGruber" starring Will Forte.

Fashion designers Kenneth Cole, 56, and Tom Ford, 48, got formal at the same amfAR event in Cannes on Thursday.

"Vampire Diaries" bloodsucker Ian Somerhalder, "One Tree Hill's" Robert Buckley and "Smallville's" Tom Welling joined their CW hunk forces at an event in NYC on Thursday.

Reassembled rock star Courtney Love told the Irish magazine "Hot Press" that she once had a fling with supermodel Kate Moss in the 90's.

British author Jackie Collins, 72, and Hollywood actress Raquel Welch, 69, joined forces at a charity event in Beverly Hills on Tuesday.