Stars' Summer Lovin'

Check out the hottest celebrity romances of the season (including The O.C.'s Mischa Barton and beau Brandon Davis). By Serena Kappes with Laura J. Downey


Lohan, 18, wasn't about to make the first move with That 70s Show's Valderrama, 24: "A girl should never do that," says the Mean Girls star (cuddling with her man in Miami). It wasn't until Lohan's 18th birthday bash on July 2 at the Hollywood nightclub Avalon that the couple, first spotted together in May, went public with their romance.