Watch Jimmy Fallon and Ariana Grande Sing Cabaret Versions of Rap Songs
Insane ... in the<em> membraaane</em>.
Because Jimmy Fallon doesn't give a fuck, yo, he dressed up in a Lucius Malfoy wig and asked Ariana Grande to Fabulous Baker Boys it up with him to lounge-act versions of "99 Problems," "Insane in the Brain," and "Thrift Shop."