Gavin Rossdale and his boys, Zuma and Kingston, continued to enjoy their relaxing vacation in Cannes today. The hot dad stripped off his shirt, revealing some ripped abs while evening out his tan as the kids played in the pool. The Stefani-Rossdales are making the best of their stay in the South of France, yachting with friends, jet skiing, and observing the beautiful sights from their luxury suite. Gwen and Gavin went from bikinis and pool gear to formal wear on Monday for Brad Pitt's star-studded The Tree of Life premiere. Their family just wrapped up a stay in the UK, but they're heading back to LA in the coming weeks. Gwen needs to be in California by June 7, when she's scheduled to host a private tea to raise money for Japan relief.