ET spoke to Underwood at the show's 'Men Tell All' special taping, airing July 30 on ABC. Underwood also explained what it's been like to reveal his truth to family, friend and the public.
ET's taking a look at a few of the big name celebs who have been picked from the crowd to participate in Britney's now-infamous 'Freakshow' number from her 'Piece of Me' show.