Zach Rance is ready to share his truth. After coming out as bisexual, the Big Brother alum opened up about his hookup with season 16 costar Frankie Grande and how the fame that followed his reality TV stint sent him into a downward spiral.The life coach, 30, revealed in an exclusive interview with Us Weekly that the Broadway star, 37, went to third base with him on October 31, 2014, just over one month after they left the Big Brother house.“It was Ariana Grande’s Halloween party.