It's Britney, b*tch! Not only is Glee new tonight: Thursday, September 20, 2012, but Season 4, Episode 2: “Britney 2.0,” is the second ever episode dedicated completely to the music of Britney Spears.

From "Womanizer," to "3," "Hold It Against Me," to "Oop!... I Did It Again," this episode is chock full of Britney hits. Want a sneak peek of what to expect? Check out our complete spoiler roundup here.

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