Excerpt from this article:
Retweets from artists or bands are now as highly prized by music fans as autographs. New research underlines the role Twitter plays for fans, who can not only connect with their favorite artists and bands, but discover new music and join the buzz around concerts and festivals.
The study, conducted for Twitter by Crowd DNA , found that 74% of music fans on Twitter say a Retweet by their favourite artist is as desirable as a traditional autograph. Findings point to the value fans place in getting recognition from their favourite artists and in seeing their Tweet shared with other fans.