Why is he sexy? For starters, there's his quirky style (he lives in France, dresses like a rock star, is not afraid of a little eyeliner) and his devil-may-care spirit (didn't take a single singing lesson to prepare for his role in the upcoming musical Sweeney Todd). Most of all, there's something heart-melting about how gaga he is for his gaggle – daughter Lily-Rose, 8, and son Jack, 5, his kids with longtime girlfriend Vanessa Paradis. "Suddenly you meet your reason to live," Depp, 44, told London's Daily Mail about being a father. "They make me happy."