CAPITOL HILL (AP) - Katy Perry and John Mayer sure looked like a couple in the stands at President Obama's inauguration. Perry took photos of her and Mayer and of Mayer holding an inaugural trinket next to his head. Not far from them was Eva Longoria, who co-chaired Obama's re-election campaign, and Marlon Wayans. Beyonce and Jay-Z were there, as well as Kelly Clarkson and James Taylor. They all performed.