Adam Lambert gives his best Lady GaGa impersonation during his upcoming guest slot on Glee.

The American Idol runner-up dons a hat, tuxedo, and heavy make-up to perform a rendition of Gaga's Marry The Night in a newly-released promo clip.

He is also shown dangling from a crystal chandelier.

The new series of Glee is due to return to the air in the U.S. next month (Nov13).