It's official - ET is reporting the theme tonight is 70's Dance Songs.

Anwar will be performing "September" by Earth, Wind and Fire...(complete with falsetto? Ba de yah, dancin' in September... ).

Constantine will be doing "Nights on Broadway" by the Bee Gees (more falsetto? )

Carrie will be performing "McArthur Park" by Donna Summer. (Possibly the worst song ever?)

Trainwreck. Film at 11. (7 MST )