Guest List: T-Pain

Hip-hop's gargling android songsmith is one of the genre's most jubilant collaborators. His feature on Kanye West's "Good Life" restyles the record into a raw sunbeam of liberation, while the insistent hook of Chris Brown's "Kiss Kiss" is a swaggering bit of R&B bubblegum. T-Pain's contribution to "All I Do Is Win", meanwhile, transforms an all-star posse cut into an inspirational prayer to the forces of self-belief.