They will try to find a place to have the the Big Mooch too, later on. Ann Romney as 'GMA' guest host blurs news-entertainment line - latimes.com At least the show, which announced Romneys guest hosting duties Thursday, signaled that it intends to treat both sides equally when it comes to line-blurring. It hopes to find a spot to bring First Lady Michelle Obama on as a co-host too. Moochelle's jaw must be biting ten penny nails in half by now. She's already slipping out of the top spot.