"If you're drinking green tea, you're nailing three healthy habits at once: You're not snacking, you're getting antioxidants and you're adding water to your diet," Pachella says. Green tea also slightly raises the metabolism. Celebrity devotees include Gwyneth Paltrow and Courtney Love, who dropped more than 50 lbs. in 2007. Green isn't your cup of tea? Try white, which "is equally as good if not better," Pachella says.