"Insane eh? I never even dreamt about winning all these awards," Rahman posted on his Twitter page after receiving the award.
He was honoured for his compositions in Danny Boyle's fairytale drama "Slumdog Millionaire" - he won for the best compilation soundtrack for a motion picture and the best motion picture song for "Jai ho", which he shares with lyricist Gulzar and Tanvi Shah.
The composition in the film has won Rahman the most prestigious international awards including two Oscars, the British Academy of Film and Television Arts (BAFTA), Critics Choice Award and the Golden Globe.
The singer-composer has thanked a string of people through the micro-blogging site.
"I once again want to thank the Almighty, my spiritual Sufi teachers - Ameen Peerullah Malik Sahib, Danny Boyle, Fox, the whole 'Slumdog...' creative team, all the awesome actors in the movie and Resul Pookutty. My whole team, Gulzarji, Sukhvinder Singh, Tanvi Shah, Vijay Prakash, my friend and sound engineer the late H. Sridhar....
"My agents Sam Schwartz and Amos Newman, my mentors Mani Ratnam, Shekhar Kapur and Subhash Ghai, and mentor in the west, Andrew Lloyd Webber, folks at id-PR, Allison and Courtney... extraordinary musicians from Chennai and Mumbai, my mother, my father, my sisters and my lovely wife and children... And all my well wishers from the world who keep me going... Jai ho India!" he posted.
Rahman started his career with director Mani Ratnam's 1992 Tamil film "Roja" and has never looked back since.