Billy Porter's Gospel Cover of 'Stronger' Impresses Kelly Clarkson.

Kelly Clarkson invites Billy Porter to duet with her on "Stronger" after being blown away by his gospel cover of the song on the NBC game show That's My Jam. Porter's partner for the performance was Patti LaBelle, who provided backup vocals and stole the show. Clarkson called Porter's cover the greatest she's ever heard of any song she's ever performed and expressed a desire to sing the church version of "Stronger." She extended a personal invite to Porter to sing the song with her anytime he wants.