The Gossip Girl cast has offered only vague details about her appearance, but Lady Gaga herself recently teased her upcoming cameo
on the show next Monday.
"First of all, my sister's a huge fan, and she's 17 years old. She was like 'Oh My God, you have to do it,'" she told MTV of her eason for appearing on the CW hit.
"And I'd seen it. It's a great show."
We doubt the cameo will feature Lady Gaga unmasked
. Expect elaborate costumes - and