Guess Who Showed Off His Briefs at the Dog Park?

Here we go!

1 of 4
Guess who gave us a glimpse of his underwear?
Kellan Lutz
Justin Timberlake
Ryan Reynolds
Channing Tatum
2 of 4
Guess who wore her hair pulled back in a ponytail?
Tara Reid
Paris Hilton
Stephanie Pratt
Katherine Heigl
3 of 4
Guess who rode his bike in traffic?
Eric Dane
Arnold Schwarzenegger
Val Kilmer
Denis Leary
4 of 4
Guess who drank out of a plastic cup at lunch?
AnnaLynne McCord
Ali Larter
Portia de Rossi
Sarah Michelle Gellar
Guess Who's Taking a Trip to the Vet?
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Guess Who's Taking a Trip to the Vet?