By People Staff
November 12, 2009 12:00 AM

With all the characters’ twisted — not to mention scandalous — relationships, Lady Gaga couldn’t have picked a better song to perform on Gossip Girl.

The pop star sings her new single, “Bad Romance,” at a private show arranged by Blair, who is trying to prove herself as a freshman at New York University this season, in an episode set to air Monday, Nov. 16 (9 p.m. EST) on the CW.

“My little sister is the hugest Gossip Girl fan ever,” Lady Gaga, who wears a 30 ft.-long dress for her performance, recently told PEOPLE.

For more on Lady Gaga’s visit to the Upper East Side world of Gossip Girl, check back to on Monday.