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Watch! Full Performance of Brittany Singing Ke$ha "Dinosaur" in Glee Season 3, Episode 19: "Prom-asaurus: (VIDEO)

Last week, we got a first listen to Brittany’s (Heather Morrisenergetic performance of Ke$ha's "Dinosaur" from Tuesday’s Season 3, Episode 19: “Prom-asaurus. But why just listen to a song when you can watch the entire performance — crazy Pebbles Flintstone costume, gigantic T-Rex heads, and all?

Original airdate: Tuesday, May 8, 2012 at 8pm on Fox 


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