If you've ever wondered how much work goes into your favourite Pitch Perfect performances, wonder no more. In this exclusive behind-the-scenes look at the filming of Pitch Perfect 3 [1]'s rendition of "Toxic" [2] (from the film's Blu-ray and DVD, which is out March 20!), it's pretty mind-blowing to consider all of the spinning plates stars Anna Kendrick [3], Brittany Snow [4], Anna Camp, Hailee Steinfeld, and the rest of the talented cast [5] have to balance while belting out a Britney Spears [6] hit. In this case, the Barden Bellas have to perform the song and nail choreography and face off against John Lithgow. Watch how they pulled everything together above!