There are snubs and then there are epic snubs. When the Grammy committee released its 2013 list of nominees — including Taylor Swift, Frank Ocean, and the Black Keys — it triggered a Twitter crusade of incensed Justin Bieber fans who are furious that the pop star's third album, Believe, failed to nab any nominations. Here, selected tweets from 21 aggrieved Beliebers who refuse to take the insult to their idol lying down: