Al Green vs. Mitt Romney
Song: "Let's Stay Together"
Controversy: After the Obama campaign released an ad that featured Mitt Romney singing "America the Beautiful," Romney's side retaliated with a spot in which Obama sings the Al Green classic "Let's Stay Together." Within a day, the ad, as well as footage of the original Obama performance, disappeared off YouTube, due to a copyright claim from BMG Rights Management on behalf of Green, an Obama supporter.
Result: YouTube restored the video after receiving an appeal letter from the Romney campaign, agreeing that it constituted fair use.