(FILES) Twitter logo is displayed at the entrance of Twitter headquarters in San Francisco on March 11, 2011 in California. Twitter on April 18, 2013 launched a music service that recommends tunes based on what people are ‘tweeting’ about and lets people sample songs they might like. “We’re releasing Twitter #music, a new service that will change the way people find music, based on Twitter,” the San Francisco-based firm said in a release. AFP Photo / Kimihiro HOSHINO / FILESKIMIHIRO HOSHINO/AFP/Getty Images ** TCN OUT **