Are you ready for a mash-up overload? We already saw Glee's Adele mash-up, the next episode isn't called "Mash-Off" for nothing. It seems like we can look forward to a few perfomances to rival "Walking on Sunshine/Halo" and "Umbrella/Singing in the Rain."
The gleeks take on just about every kind of mash-up imaginable, from Pat Benatar's "Hit Me With Your Best Shot/One Way Or Another" and Hall and Oates "I Can't Go For That."
Take a listen and tell us which one's your favorite. "Mash-Off" airs Tuesday, Nov. 15 at 8 p.m. on Fox.
Click on the photo to see our Glee gallery.