5/10
Jackson Lee / Splash News
E!'s most adorable star wasn't the only famous tot at Harlow Madden's celebuspawn-studded birthday bash in January 2011. Guests also included Chris Ivery, Ellen Pompeo and Stella Luna; Gwen Stefani, Gavin Rossdale, Kingston and Zuma; Jessica Alba, Cash Warren and Honor; and Tobey Maguire's wife, Jennifer Meyer, brought along their kids Ruby and Otis. She's so popular!