Sam in a suit? Brittany in glasses?

Oh, yes, Gleeks, prepare for a major "Makeover" this Thursday.

While a bulk of the attention leading into this week's episode has focused on Sarah Jessica Parker's debut, viewers should also expect the election at William McKinley to take center stage, as Brittany and Sam morph into political version of themselves and belt out a version of Hole's "Celebrity Skin."

Watch the performance in its entirety now, and then visit our Glee music section soon after the episode airs to download it off iTunes:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.