VIDEO : Who's Defending Madonna's Prince Tribute?

Not everyone was pleased with Madonna's tribute to Prince at the Billboard Music Awards on Sunday night. The pop icon performed a cover of "Nothing Compares 2 U" and was then joined on stage by Stevie Wonder to perform "Purple Rain." The BET Awards quickly came out to denounce the performance, saying they would have a much better Prince tribute at their awards ceremony in June. Questlove immediately came out in defense of Madonna's performance in a series of tweets. Questlove introduced Madonna's tribute at the event and also helped engineer the performance.