While Irvin sourced content, Jamba became Jamster in the United States. Irvin struck a deal with Kevin Liles, President of Warner Music Group, to provide mobile consumers with early access to hip-hop artist Mike Jones' debut album ""Who Is Mike Jones?""—in return, Jones created the first artist-endorsed Jamster ring-tone advertisement in the US. When ""Who is Mike Jones"" was released it debuted among the top 5 albums on the "Billboard" charts and went on to sell over a million copies. The Crazy Frog ringtone did the same in Europe.