"Every morning when I wake up, the first thing I do is drink a big bottle of water," says Cameron Diaz
. "You can't sip it, though; you have to chug it!" Demure she's not. This is, after all, the girl who accepted a Nickelodeon Kids' Choice Award for "Best Burp" (performed as Princess Fiona in last year's Shrek) with a grin so wide you'd think she'd won an Oscar. And who, in between goofy guffaws, shakes her can with such abandon in so many films—including her latest comedy, The Sweetest Thing
—that it was the subject of her monologue when she hosted Saturday Night Live
last month. "Hers is not an unapproachable beauty," says her Vanilla Sky
director Cameron Crowe. "It's just the maraschino cherry on top of everything else." Fine, but she'll take the sundae too. "She eats like a trucker, and then five minutes later she'll get into a bikini," says her Charlie's Angels
director, McG. Diaz, 29, makes up for her hearty appetite by Strength training three times a week. "It's not about what you weigh," says the 5'9" former model, who has been dating Panic Room
actor Jared Leto since 1999. "Your body just has to be strong. Anyone who is strong will look good as well."