Atlanta Journal-Constitution reports that during one week in March, 50 Cent’s mega-hit ‘In Da Club’ reached 170.2 million radio listeners, according to the industry trade magazine Billboard. “It’s the most listened-to song in chart history,” said Silvio Pietroluongo, who oversees Billboard’s Hot 100 ranking of popular songs. The tune’s success helped 50 Cent’s album ‘Get Rich or Die Tryin” sell 872,000 copies in its first four days of release — a record for a new artist.