Adele reveals new song via mysterious ad
![Adele reveals new song via mysterious ad](http://media.pn.am/media/issue/199/167/photo/145x145_thumb_photo_199167_3688bc5db.jpg)
The singer released her second album, 21, back in 2011, when it achieved critical acclaim and huge commercial success.
The singer released her second album, 21, back in 2011, when it achieved critical acclaim and huge commercial success.