'Glee's' Amber Riley's on Fire with 'Disco Inferno," Brittana Back-Up Dances - Watch

Glee’s back and getting its disco on with “Saturday Night Glee-ver” this Tuesday, and the powers that be at Fox’s smash hit are slowly leaking videos and audio from the episode.

Earlier this week we posted audio of Naya Rivera singing Yvonne Elliman’s disco classic “If I Cant’ Have You,” and now there’s video of Amber Riley’s Mercedes tearing it up on The Trammps “Disco Inferno,” with Brittany (Heather Morris) and Santana (Naya Rivera) as her smokin’ back-up dancers.

If that weren’t enough there’s also video of Blaine (Darren Criss), Brittany and Mike (Harry Shum) dancing their tails off to the Bee Gees’ “You Should Be Dancing,’ and wow, can former back-up dance Morris shake it. If you look closely you’ll spy Santana watching her girl Brittany work it out.

Watch “Disco Inferno”:

And here’s “You Should Be Dancing”

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