Los Angeles - R Kelly reportedly owes $4.8m in back taxes.
The I Believe I Can Fly singer is said to have not paid anything on his earnings from 2005, according to documents filed by the Internal Revenue Service (IRS).
He owes $1 472 366.77 from 2005, $710 520.51 from 2006, $376 180.11 from 2007, $1 122 694.90 from 2008, $173 815.18 from 2009 and $992 495.24 from 2010, bringing his grand total to $4 848 072.71.
Despite the huge bill, the singer is "confident" the matter can be resolved.
'Obligations will be satisfied'
His spokesperson told gossip website TMZ.com: "R Kelly is in the process of working everything out with the government and is confident that all his obligations will be satisfied."
Meanwhile, Kelly will headline the Reggae Sumfest next month in Montego Bay, which takes place from 15 - 21 July.
He had been due to perform at last year's Reggae Sumfest but had to pull out after complaining of throat pain and later having an emergency operation on his throat.
Sumfest organiser, Johnny Gourzong, said: "R Kelly was so disappointed with not being able to come to Sumfest last year that we spent the whole year trying to work out a make-up date, which was Reggae Sumfest 2012."