B.o.B. is getting into that Grand Hustle work ethic in the run up to the release of his sophomore record Strange Clouds, following up yesterday's 'How Bout Dat' music video by hitting fans with a freestyle over Tyga's ever-popular Rack City.

As usual, Bobby Ray has given the new track some visuals of its own, featuring the North Carolina rhymespitter, ever-present sidekick Trae the Truth and the rest of his team killing time inbetween shows.

Strange Clouds is due for release on March 13. Watch B.o.B. sharpening his bars with a Rack City freestyle below...

B.o.B. Takes The Stage...