Who'd You Rather?

Singer/songwriters Jason Mraz, 32, and Rob Thomas, 37, performed together at a children's hospital in New York on Monday.

Royal biological brothers Prince William, 27, and Prince Harry, 25, regaled it up at the same event in London on Tuesday.

Fergie, Kate Hudson, Penelope Cruz, Marion Cotillard and Nicole Kidman put their best faces forward at the premiere of "Nine" in NYC last night.

"Sex and the City" gal pals Kim Cattrall and Sarah Jessica Parker worked their Manolos at the same NYC event on Monday.

Demi Moore, 47, and Heidi Klum, 36, showed off their genetic gifts at the same event in L.A. this week.

Daniel Craig, 41, and Hugh Jackman, also 41, took time out of co-starring in the Broadway play "A Steady Rain" to attend the same event in NYC this week.

While neither is still bound to Tom Cruise, Penelope Cruz and Nicole Kidman compared notes at the premiere of their new film "Nine" in L.A. last night.

Country bumpkin Taylor Swift, 19, and pop princess Rihanna, 21, glammed it up at the same event in NYC last night.

Blonde 51-year-old MILFs Sharon Stone and Madonna stormed through D.C. and NYC respectively this weekend.

Real Madrid futbol stud Cristiano Ronaldo and Spanish tennis ace Rafael Nadal both went topless in Spain this weekend.

Living legend Liza Minnelli, 63, and Lorenzo Lamas' mother Arlene Dahl, 81, stunned the crowd at an event in NYC last week.

Molly Sims, 36, and Mandy Moore, 25, got friendly at the same Beverly Hills event this week.

Meg Ryan, 48, and Cheryl Hines, 44, attempted to smile their way through the same event in NYC on Thursday.

Evangelical Christian dandy boy band biological brothers Kevin Jonas, 22, and Joe Jonas, 20, stayed pure at the same event in L.A. on Wednesday.

Actors/brothers/Scientologists Danny Masterson, 33, and Christopher Masterson, 29, showed off their beards at the same NYC event.

"Dancing with the Stars" best buds Mark Ballas and Derek Hough hustled their way to the same event in Hollywood this weekend.