Amazon has the Creedence Clearwater MP3 Album Chronicle: 20 Greatest Hits on sale for only $3.99 today! You may not think that you know this band, but you do! “Heard It Through The Grapevine,” “Have You Ever Seen The Rain,” and “Proud Mary” are just a few of the songs that you will know! Plus, if you have any Amazon gift certificates from Swagbucks, you can get yours for free!