I love each and every one of these since they are my favorite songs from those musicals (except for Wicked but they already did my favorite song: Defying Gravity ♥ But I'd love to have all Wicked songs on Glee since it's my favorite musical of all time) :D
Since I have to decide though I chose You can't stop the beat because it's happy and addictive (just like Glee :D) so it would be a perfect fit! :)

I'm really sick of Cell Block Tango, so NO to that one.

this and Mamma mia

or Chicago - Cell Block Tango

or what is this feeling- i'd love to see Quinn and Rachel do that one!

If they do Cell Block Tango...I'm not watching this damn show anymore

followed closely by you can't stop the beat (my favorite hairspray song <3)

They don't need to detroy any more wicked songs. Defying Gravity was terrible.

And hairspray

i like cell block tango and mamma mia and you cant stop the beat but i chose you cant stop the beat cos its amzing :)

can't wait for that!!!! C'mmon gleeks!

I can see Rachel and Quinn doing this very well.

Hairspray has that Glee feel to it. They would do so great, and there's plenty of solos in this song for everyone!

i love all these songs so much!