B.o.B. headlined the House of Blues on the Sunset Strip the night before the 2013 Grammys in Los Angeles. He didn't do it all alone. L.A. rapper Problem and fellow ATL native Trinidad James opened up before the real zinger of the evening: an unannounced T.I., who arrived with his wife Tiny. Tip joined B.o.B. for a run through of "We Still in This Bitch." Watch the performances below.