'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'.

In the Hello Tunes section 'Kolaveri Di', topped with 210,000 downloads within 18 days of its launch.

Bollywood celebrities Katrina Kaif and Shah Rukh took the leading position in the category of most downloaded images of the year.

Deepika Padukone, Kareena Kapoor, Jacqueline Fernandez and Priyanka Chopra wrapped up the top five in the list of most downloaded images of Bollywood actresses, while Salman Khan, Shahid Kapoor, Imran Khan and John Abraham made it to the top five among the actors.

'Today, the mobile is a major source of entertainment and information - be it a user in a large town or small village. For the third consecutive year, we are proud to bring to you choices and preferences of the India of today through Airtel Mobitude 2011,' N. Rajaram, chief marketing officer, Consumer Business, Bharti Airtel said in statement.

In the Hollywood segment, Kim Kardashian and King of Pop Michael Jackson took the top positions.