Andy Cohen is obsessed with the “jaunty, bedazzled chapeau” Christina Aguilera has been wearing on “The Voice.” But now that “The Voice’s” live shows have begun, Xtina’s wardrobe will finally actually change — which means bye bye, flying saucer beret. On Monday’s “Watch What Happens Live,” Christina phoned in to help Andy say farewell to her cap, but she wound up shocking him with a surprise. The crazy headpiece. In the Club House. For him to keep. Take a look at Andy’s priceless reaction to the gift above.