Pictures of Robert Pattinson, Kristen Stewart, Heidi Klum Bikini, Benjamin Brady

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The annual Costume Institute Gala kicked off the week with a red carpet full of hot couples like Sienna Miller and Jude Law and one sexy, solo Kristen Stewart. She had Robert Pattinson back by her side when they arrived at LAX together after taping Oprah in Chicago. Heidi Klum and Seal celebrated their wedding anniversary on a trip to Mexico while Gisele Bundchen geared up for her first Mother's Day with baby Benjamin. Click through to see the rest of this week's top stories!