A.R Rahman's song 'Balleilakka' from Sivaji, starring Rajini, takes on a new spin with these pretty awesome performances by a few different choir groups around the world.
Here's the original 'Balleilakka'
http://youtu.be/Tma8zoLEPJU
Here's the Austin High School Concert Choir's performance
http://youtu.be/XQWLqcNr9B8
Here's Augustana Choir's performance (starts at 8:30)
http://youtu.be/M8IK_Vve8ys
And finally one by Laguardia Mixed Chorus
http://youtu.be/JiNbmRFAcAM