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At last night's Emmys, we caught up with a few Glee stars to get the inside dish on the highly-anticipated Britney Spears episode. "I can't believe [creator] Ryan [Murphy] got her to do this! I'm so thankful! She's so professional and so great to work with," Outstanding Lead Actress nominee, Lea Michele (in Oscar de la Renta), told us. And as for Spears' on-set persona? "Everyone makes her out to be a certain way, but she's so down to earth, very cool, and she looks great," says co-star Harry Shum of Spears (pictured here on-set with Heather Morris). "She's so talented and so I'm excited what she's brought to the table as far as the premiere." Make sure to watch the premiere on Tuesday, September 21 at 8pm EST on Fox. Can't wait till then? Check out a brand-new Season 2 promo pic after the jump!

—Rachel Jacoby, with reporting by Scott Huver and Andrea Simpson

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