Eminem vs. New Zealand National Party
Song: "Lose Yourself"
Controversy: Eminem doesn't usually involve himself with New Zealand politics, but last year the rapper and his publishing company filed a copyright infringement suit against the National Party after Prime Minister John Key used the hip-hop star's "Lose Yourself" in a reelection campaign ad without permission.
Result: The National Party insisted they had obtained the right to use to the song through an Australian production company but stopped using the track. Nonetheless, Eminem is still seeking damages. The case was scheduled to go to court last February, but was put on hold; according to recent reports, it may be reset for any day now.