So while he sits in the house at the Nokia Theatre, he'll have a front-row seat to take in the show.
Although Florence and the Machine are favorites of the "Nothin' on You" star, he told MTV News he's looking forward to all of the performances. From Drake to Usher to Justin Bieber, B.o.B said he thinks everyone is going to deliver.
"I really want to see what everyone has up their sleeve as far as performances go," he explained. " 'Cause for me, I take performing very seriously. So I can bet everyone else is like that. So it's gonna be one hell of a show."
B.o.B has had a good year, as the upstart MC scored a #1 debut album and three top 10 hits, "Nothin' on You," "Airplanes" and "Magic."
The lanky lyricist will take the stage to perform "Nothin' on You" with Bruno Mars and then "Airplanes" with Paramore's Hayley Williams.
The Saturday rehearsal with B.o.B, Bruno Mars and Williams was relaxed and filled with plenty of impromptu moments. Bruno Mars and B.o.B each busted out into covers, with Bruno trying out Drake's "Find Your Love" and B.o.B covering the Notorious B.I.G.'s "Juicy."
And B.o.B and Williams, who had recorded "Airplanes" separately and later shot their parts for the video at different times, met for the first time.