by Hilton Hater at

Keenan Cahill is at it again.

The Illinois teen, who has made a name for himself by recruiting celebrities to lip sync with him online to a number of pop hits, appears in a new video alongside Glee cast members Harry Shum Jr., Dianna Agron, Darren Criss and Jenna Ushkowitz.

Watch below, as Cahill - who is affected by Maroteaux-Lamy syndrome - and this all-star squad dance around to Katy Perry's “Last Friday Night (T.G.I.F.).”

Other stars that have teamed with Chaill include 50 Cent, David Guetta, Pauly D, Brian Wilson and Cody Ross.

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by Free Britney at

Katy Perry is loving life these days. She's newly married and her music is climbing the charts. Her impact on popular culture has even been honored by Glee.

A number of music stars of different genres, namely Lady Gaga, Madonna and Britney Spears, have gotten the Glee treatment so far. Now it's Katy's turn.

The Fox show's cast recently put together a terrific cover of "Teenage Dream," and Mrs. Russell Brand immediately took to Twitter to express her approval.

Gleeful KP

Katy Perry is the latest star to be immortalized on Glee.

"Oh… My… Gosh… this just brought a sweet tear to my eye! Teenage Dream on GLEE makes my heart go WEEEE!" wrote Katy, and we must say we AGREEEE!

To hear the Glee cast's cover, with Darren Criss - who plays a character named Blaine, rumored to be boyfriend of Kurt - on lead vocals, CLICK HERE!

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