Britney Spears upload Photo on Glee Set

Britney Spears with assistant, Brett Miller.

Britney Spears tweeted that she's on the set of Glee to shoot her scene for the "Britney-theme" episode.

The pop princess tweeted, "About to do my first shot of the day for Glee tweeties! Here we goooo!" and later, she added, "what's up GLEEKS? Having so much fun on set!! Can't wait for you guys to see the episode!"

Glee creator Ryan Murphy said in recent interview, "Britney Spears is pop culture, and I think she' s been through a lot. I want to do something that just sort of says, you know what, 'thank you for what you have done."

[Photo courtesy by twitter.com/britneyspears]