Kim Kardashian‘s sex tape sales have sky rocked since her andÂ Kanye WestÂ announced she was preggo. TMZ reports that Vivid Entertaintment,Â which owns the sex tapeÂ ‘Kim K. Superstar’Â says that fans are excited about the new baby on the way and sales are up! Video-on-demand purchases of the sex tape have increased 80% since Sunday night. This is the biggest increase since her marriage to Â Kris Humphries. TheÂ VOD, online, or DVD has Â steadily increased every month since Kanye and Kim hooked up last Spring.