Freshly leaked from Sony to day (source withheld), here’s the tracklist for Glee: The Music, Volume 3 – Showstoppers (and Deluxe Edition). Since the Madonna songs were all released on the separate The Power Of Madonna EP, none of them will be featured on this volume. Due for release on May 18th 2010 worldwide. 

1. Hello Goodbye
2. Gives You Hell
3. Hello (featuring Jonathan Groff)
4. A House Is Not A Home
5. One Less Bell To Answer / A House Is Not A Home (featuring Kristin Chenoweth)
6. Beautiful
7. Home (featuring Kristin Chenoweth)
8. Physical (featuring Olivia Newton-John)
9. Total Eclipse Of The Heart (featuring Jonathan Groff)
10. Lady Is A Tramp
11. One
12. Rose’s Turn
13. Dream On (featuring Neil Patrick Harris)
14. Safety Dance
15. I Dreamed A Dream (featuring Idina Menzel)
16. Loser
17. Give Up The Funk
18. Beth
19. Poker Face (featuring Idina Menzel)
20. Bad Romance

(Deluxe Edition tracks are listed in bold.)

See http://en.wikipedia.org/wiki/Music_of_Glee#Track_listing
for full info on Music from Glee, including listings and release dates