"Straight Outta Compton" by N.W.A, rendered as an introspective acoustic femme-rock ballad by Nina Gordon. Unmissable.
UPDATES: While we're talking covers, and while I'm ripping content from Copy Cats, who's heard Sean Connery doing a cover of The Beatles' "In My Life"? Hilarious! Very much in the style of the musical outings of William Shatner and Leonard Nimoy, but Scottish.
Also, Greg Laswell does "Girls Just Wanna Have Fun" as a depressing Eternal Nightcap-esque suicide ballad.