It's never easy being the opening act on a major rock tour. Many fans resent the fact that you're coming between them and the act they've paid to see, and you usually play to rows of empty seats. Still, it's often worth it to convert a tiny fraction of the large audience. Most of the biggest names in rock – from Guns N' Roses to Queen – cut their teeth opening for the major names of their time. Since it's now the height of the summer concert season, Rolling Stone recently asked you to vote on your favorite opening acts in rock history. Click through to see the results.