Watch! Brittany’s Sings Ke$ha's "Dinosaur" in Glee Season 3, Episode 19: "Prom-asaurus: (VIDEO) — Plus, Is Quinn Missing?

Earlier today, we got a first listen to Brittany’s (Heather Morris) energetic 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? Watch the video clip here. Entertainment Weekly has the exclusive first look at Brittany’s can’t-miss performance at senior prom. Seriously, Heather...


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