Both host Conan O'Brien and best original song presenter Mick Jagger suggested that the 'Complete Unknown' subject had passed on attending the ceremony.

Karla and Drake jokes, Adrien Brody's cutoff, last-minute Gene Hackman scramble, if Conan will return, Hulu problems and more.

In a studiously silly (and sniffily) performance that began with the gross-out humor of his emerging out of the body of Demi Moore from “The Substance,” O’Brien evoked some of his delightfully experimental bits from his old late-night show.