Britney Spears 'Glee'
Britney Spears is such a GLEEk. The superstar eagerly tweeted all day long while on set for her upcoming appearance on 'Glee.' "About to do my first shot of the day for Glee tweeties!" Spears wrote on her Twitter page. "Here we goooo!" Later, she and Heather Morris posed for a photo (above) while on set of the hit Fox show. "What's up GLEEKS? Having so much fun on set!! Can't wait for you guys to see the episode!"