CBS has gone to great lengths to ensure that when viewers tune in to the 55th Annual Grammy Awards to see their favorite artists perform and take home the industry's top award, they'll get an entertaining night of performances and trophies and not much more. But music's biggest night hasn't always gone quite so smoothly...
Since most award shows air live, there are infinite opportunities for someone to say or do something unexpected and controversial. Before this year's Grammy Awards, we rounded up all the crazy, wild, and wacky moments from Grammys past.
From onstage protests to shocking collaborations, awards being taken away and questionable wardrobe choices, check out the most controversial Grammy moments in our gallery:
The 55th Annual Grammy Awards air Sunday at 8 PM ET/PT on CBS.
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