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

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AVRIL LAVIGNE & DERYCK WHIBLEY

Lavigne, 19, and Sum 41 frontman Whibley, 24, gave photographers an eyeful kissing and canoodling poolside at the Beverly Hills Hotel in June. Though neither of the Canadian pop stars has commented on their connection, their chemistry is clear.