There are at least two artists with the name Stacks. 1. The first is the solo moniker of Belgian musician Sis Matthé, member of White Circle Crime Club (http://www.last.fm/music/White+Circle+Crime+Club).
2. The second is a differently written version of Stack$ (or $tacks), the stage name of Yannique Barker. http://www.last.fm/music/Stack$

Read more about Stacks on Last.fm.