Gavin and Gwen at Ellens 50th Birthday Party

Ellen had over 300 guests show up to celebrate her mid-century mark, including newlyweds Mariah Carey and Nick Cannon, who made Ellen’s party their first stop in LA as husband and wife. Also in attendance were Tom Hanks and Rita Wilson, Gwen Stefani and husband Gavin Rossdale, Janet Jackson, Jennifer Love Hewitt, Matthew Perry, The Jonas Brothers, Lauren Graham, Ray Romano, Courteney Cox and David Arquette, TR Knight, David Spade, Kevin Connolly, Cheryl Hines, Ricki Lake, Guns & Roses’s Slash, David Spade, Pink, Noah Wyle, Allison Janney, Sean Hayes, Suzanne Sommers, Joely Fischer, Sarah McLachlan, Leah Remini and and the Hilton sisters - Paris and Nicky, with their paramours Benji Madden and David Katzenberg.