We knew Blurred Lines topped the charts for 2013 and now we also know exactly how much a smash hit single is worth.

The performers behind the controversial song, Pharrell Williams and Robin Thicke, are being sued by the estate of Marvin Gaye for what the estate's lawyers allege is significant copyright infringement of Gaye's Got to Give It Up.

Robin Thicke, rapper T.I. and Pharrell Williams performing Blurred Lines.

As part of the proceedings, the record companies involved had to disclose the financial details of the song.

UMG Distribution, Star Trak and Interscope disclosed Blurred Lines cost $US6.9 million to make but has reaped more than $US16.5 million ($20 million) in profit since its release.