According to NPD, awareness and usage of Pandora, a leading online radio station, doubled year over year to 18 percent of Internet users; one-third of those who were aware of Pandora report using the service. Similarly, the percentage of consumers claiming to listen to music on social networks climbed from 15 percent in the fourth quarter (Q4) of 2007 to 19 percent in Q4 2008. Nearly half of U.S. teens are engaging with music on social networks, which is an increase from 37 percent a year ago; among college-age Internet users, the percentage increased from 30 percent in 2007 to 41 percent in 2008.