Viral video stars Andy Samberg, Akiva Schaffer and Jorma Taccone, AKA comedy trio The Lonely Island, seek to extend their repertoire of pop music parodies with this hip-hop mockumentary.

The life and career of a big-headed rapper (Samberg) go off the rails after he ditches his childhood friends/band-mates (Schaffer and Taccone) to go solo.

There is a fair share of decent gags – and more than a fair share of celebrity cameos.

Appearing as themselves, Seal, Michael Bolton, Mariah Carey, Paul McCartney and Ringo Starr all get in on the act, but Justin Timberlake has the most fun, playing the rapper’s personal chef.