Vivid Entertainment, that owns 'Kim K Superstar', said that the video-on-demand purchases of the sex tape have spiked 80 per cent since Sunday night, TMZ Online reported.
It is the biggest increase that the tape has seen since the 32-year-old reality star married Kris Humphries.
The reality TV star had sued distributors Vivid Entertainment for ownership of the 2003 tape - allegedly stolen during a house move but dropped the suit in April 2007 and settled with the company for USD 5 millions.
