Mumford & Sons, Coldplay, Florence + The Machine, Kings Of Leon and more also make list
Songs by Kelly Clarkson, Miguel, Passion Pit and more also removed
Singer calls the former Wham! frontman her 'hero' in Twitter post
Adele's '21' was released in 2011 and has sold over 4.74 million copies
The singer beats Amy Winehouse, James Blunt, Leona Lewis and Dido to top spot
Singer had been rumoured to be making live return at 2015 festival
Photo was uploaded by star to her Instagram account yesterday (January 22)
The follow-up to 2011's '21' is mooted for release later this year
Singer is understood to have "made a donation" to charity in lieu of recording vocals for the single
Chris Martin, Ed Sheeran and One Direction all performing on the charity single