New York - Thirty-three million Americans age 12 or older -- or 13% of the population -- listen to an Internet radio station during the average week, up from 29 million a year ago, according to a report from Arbitron (NYSE: ARB) and Edison Media Research.

The study found that 63% of online radio listeners have a profile on a social network site, compared with 24% of the general population of Americans 12 or older.

The top social networks among online radio listeners was MySpace (28%) followed by LinkedIn (24%).

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http://www.edisonresearch.com/home/archives/2008/03/online_radio_re.php