Big Bird brought some of the “Sesame Street” gang by “Lip Sync Battle,” and Jason ... Elmo jumped out of a cake to do some singing. At that point, Schwartzman knew he was done ...

You haven't lived until you've seen Big Bird and Elmo smash some ... Things really heat up, though, when Elmo pops out of a giant yellow tiered cake and rips into Fergie’s verse as the crowd ...