Adam Lambert's Glee performance of 'Marry the Night' has debuted online.
The American Idol alum will make his first appearance on the Fox series when it returns from hiatus in the US on November 7.
Lambert and fellow guest star Demi Lovato will appear in 'A Katy or a Gaga', which will be the first episode to air since the Cory Monteith tribute episode 'The Quarterback'.
Lambert will play the character of Elliott 'Starchild' Gilbert in the show.
Who's marrying the night on Nov. 7th? xx