Without a doubt, Adele's '21' album has been one of the biggest albums in recent memory. The album was released in February of 2011 and has appeared among the top 40 biggest selling albums on the Billboard Album chart until this past week when the album fell to #42.

The album was closing in on Shania Twain's record setting album Come On Over, which spent 127 weeks in the top 40, 21 from Adele was there for 119 weeks. 21 spent an impressive 20 weeks sitting in the number one position on the album chart during 2011 and 2012.

It has been reported that Adele is back in the studio and beginning to work on a new album, but no anticipated date for its release has been announced yet. So in the mean time, we'll have to listen to her hits from 21!