Adam Lambert gives his best Lady Gaga impersonation during his upcoming guest slot on Glee....
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 next month (Nov13).
