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19. Nicki Minaj feat. Rihanna - Fly
(written by: Hissink, Jordan, Maraj, Rotem, Rishad; 2010; Released August 2011; UK #16)
The biggest Urban crossover act since Kanye West, Minaj has quickly cemented herself as the high priestess of pop-hip-hop. Dabbling in electro, dub step and j-pop, among others, her debut album has seen a smorgasbord of hits impact the charts. This Rihanna duet was one of the finest (though there is another appearance a bit later on) with soaring vocals that were made all the more poignant after the death of Minaj's cousin not long before it's mainstream release.