"Chammak Challo", the popular number from Shah Rukh Khan's mega-budget production venture "RA.One", has been named the most downloaded song and video of the year in a new survey by wireless telephony major Airtel.

Performed by international singer Akon, the peppy number featuring Shah Rukh Khan and Kareena Kapoor topped the list of the most downloaded songs followed "Dhinka chika", "Senorita", "Zor ka jhatka haye" and "Teri meri meri teri".