Britney Spears is headed to William McKinley High School, to the excitement of Gleeks everywhere. The Britney-themed episode will debut next week, and everyone wants to know about the pop princess’ guest role. Cast member Heather Morris recently shared some secrets from the set.

She dished on what is being called the “Britney/Brittany” episode, in which her character works frequently with the pop icon.

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“Through a special substance, I go under and have a couple of dream sequences — not only myself, but with Santana [Naya Rivera],” Heather explained to the Australian magazine TV Week, via MTV News. “A lot of it has to do with Will [Matthew Morrison] not allowing us to perform Britney Spears songs, because he doesn’t agree with what kind of entertainer she is, so it’s our fight to do Britney. But it’s not just us doing Britney in show choir; there are other sequences — it’s our homage to her.”

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Unlike some of her castmates, Heather said she wasn’t nervous to work with Britney because she had met her before.

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“It wasn’t really nerve-racking, because I’ve met her before and I wasn’t really overwhelmed by who she is,” she admitted. “But the idea of what she has given us for the show and, for me, getting to dance with her and play with her on set, I was just staring at her at one point and thinking, ‘This is just so frickin’ awesome.’ ”

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“She was my idol from, like, age 12 to 16,” Heather added. “I sang to her [songs] in my living room and danced to her — I learned all her moves. And I had my talent shows and I lip-synched to her. I just kept flashing back to growing up and being obsessed with her.”

In the episode airing next Tuesday, Brit performs her hit collaboration with Madonna, “Me Against the Music.”

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Also, “Baby One More Time” and “Toxic” are allegedly tunes set to be featured in the episode.

Be sure to catch the season two premiere of Glee tonight at 8 p.m., as New Directions heads to NYC for Nationals!

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