"Excited to creatively partner with Will.i.am to recreate an early popular track of mine in a new flavour," Rahman posted on his Facebook page Wednesday.
The "Birthday" song follows the tune of Rahman's peppy number that originally featured in Tamil film "Kadhalan", which was dubbed in Hindi as "Humse Hai Muqabla" and in Telugu as "Premikudu". It was picturised on dancer par excellence Prabhudheva.
Will.i.am has reportedly co-produced his new song with Damien LeRoy, and it was co-written with Rahman, up-and-coming R&B artist Cody Wise and US producer Keith Harris.
He thanked Rahman via a tweet.
"A.R. Rahman thank you so much for everything. I can't wait for everyone to hear it. When I go to India, you please show me the town," posted Will.i.am.
Rahman flew to Los Angeles earlier this month for the premiere of Hollywood film "Million Dollar Arm", for which he has composed the tunes.
