Lea Michele Denies 'Glee' Fight (Video)

Meanwhile, Jimmy Fallon and Drew Barrymore unleash another edition of Lip Flip.

David Letterman seemed to enjoy his flirtatious interview with Lea Michele -- who denied any "cat fights" had taken place on the set of Glee.

Reports indicated she was feuding with with costar Naya Rivera, and things allegedly got physical. But on Friday's Late Show, she told Letterman it wasn't true, adding that if such a "cat fight" ever did take place, it would involve copious amounts of Jell-O, and, "It would be super hot."

STORY: 'Glee's' Ryan Murphy on New Endgame: Final Season is Not 'New York-Centric'

Meanwhile on The Tonight Show, Jimmy Fallon and Drew Barrymore gave the people what they wanted – another addition of Lip Flip.

What were your favorite moments from Friday's late night shows? Sound off in the comments.