R. Kelly may believe he can fly, but he's clearly ambivalent about ponying up to Uncle Sam.

The R&B singer reportedly owes more than $4.8 million in taxes, reports TMZ.com.

According to documents filed by the IRS, Kelly owes money on his taxes going way back to 2005. It breaks down like this ...

2005 - $1,472,366.77

2006 - $710,520.51

2007 - $376,180.11

2008 - $1,122,694.90

2009 - $173,815.18

2010 - $992,495.24

... for a total of $4,848,072.71.

A representative for the singer tells TMZ Kelly is in the process of "working everything out."