Jack White vs. the Black Keys
The beef began in 2013, after a series of leaked e-mails between Jack White and his ex-wife Karen Elson showed White calling Keys' frontman Dan Auerbach "an asshole" and accusing him of copying the White Stripes' sound. Keys' drummer Patrick Carney, in response, said that while he thought White "sounds like an asshole," he reasoned that "we've all said fucked-up shit in private, and divorce is hard."
A year later, in Rolling Stone's June cover story, White spoke at length about the e-mails and was given the opportunity to clear the air. Instead, in true White fashion, he ended up doubling down: "There are kids at school who dress like everybody else, because they don't know what to do. There are musicians like that, too. I'll hear TV commercials where the music's ripping off sounds of mine, to the point I think it's me. Half the time, it's the Black Keys." When his comments began to get picked up by news outlets, White issued a statement apologizing to the Black Keys and wishing them "all the success they can get."