One of the 'Glee' covers we were most looking forward to on the upcoming 'Glee: The Music, Volume 4' was a 'Glee'-ified take on Katy Perry's "Teenage Dream." Today, previews from next week's episode, "Never Been Kissed," leaked online and lo and behold, guess what tune made the cut?

'Glee' newbie Darren Criss takes the lead on the Katy Perry song. Since he's rumored to be Kurt's new boyfriend, we're guessing the lyrics are dedicated to McKinley High's fiercest fashionista.

The previews also include a Puck and Artie duet of "One Love," and two new mashups -- the boys take on "Stop! In the Name of Love" and "Free Your Mind" (which would be great without the out-of-place electric guitar roaring in the background) and the girls tackle "Livin' On a Prayer" and "Start Me Up" (which, due to the Bon Jovi, sounds very familiar).



In other 'Glee' news, Michael Ausiello reported yesterday that one member of New Directions will transfer to a new school within the next six episodes. Since Kurt's new boyfriend goes to an all-boy private school, Kurt is the most likely candidate. But Ausiello had another, more horrifying scoop: "Will Schuester is about to hear the three scariest words of his life -- Principal Sue Sylvester." What?! This better be one of those "tease you for an episode but it's really not gonna happen" things, or we're going to be very upset.

What do you think about the leaked songs? And who do you think is going to transfer?