When it comes to the hottest Hollywood couples, it's not just who they adore. It's what they wore. From Vanessa and Zac's classic American style to Gwen and Gavin's rocker duds, I'm putting the paparazzi's favorite pairs to the ultimate test.

See more stylish sweethearts, and enter to win a PS: I Love You body set from Bath & Body Works, in this Best-Dressed Celeb Couples gallery.

Photos (left to right): Getty Images; Jean Baptiste Lacroix/Getty Images; FilmMagic