Most ringtone/mastertone tracks sold in the US in one year by one artist

‘Buy U A Drank’ by Florida rapper T-Pain (born Faheem Najm) sold 2.3 million mastertones in 2007. His earlier track ‘I’m N Luv (Wit A Stripper)’ sold a record-breaking 5 million ringtones – four million of which were in an unprecedented five-month period.