halfsie or fullsie: Villegas, Arroyo, Keegan, C.K. and Ferrer

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halfsie or fullsie: Villegas, Arroyo, Keegan, C.K. and Ferrer

Carlos Arroyo (Marc Serota/Getty) Age: 31 Point guard for the NBA's Miami Heat. Recently embarked on a reggaetón career.

Carlos Arroyo (Marc Lecureuil/Getty) Fullsie: Puerto Rican.

Andrew Keegan (Noel Vasquez/Getty) Age: 31 Actor best known for roles in the movie 10 Things I Hate About You and the TV series "Seventh Heaven."

Andrew Keegan (Frazer Harrison/Getty) Halfsie: Colombian mother.

Jasmine Villegas Age: 16 Singer and actress best known for appearing in Justin Bieber's "Baby" video and later being photographed kissing Bieber. Halfsie or Fullsie?

Jasmine Villegas (Frazer Harrison/Getty) Halfsie: Mexican father and Filipino mother.

Louis C.K. (Frederick M. Brown/Getty) Age: 43 Stand-up comedian who stars in the TV show "Louis." Also worked as a writer for the "Late Show with David Letterman" and "Late Night with Conan O'Brien." Halfsie or Fullsie?