Kardashians hit with mega lawsuit NOVEMBER 02: Khloe Kardashian and Kim Kardashian arrive at the Kardashian Kollection Handbag launch at H...

Kardashians hit with mega lawsuit

NOVEMBER 02: Khloe Kardashian and Kim Kardashian arrive at the Kardashian Kollection Handbag launch at Hugo's on November 2, 2011 in Sydney, Australia. The Kardashian sisters will make an in-store appearance at David Jones tomorrow. (Photo by Lisa Maree Williams/Getty Images)

Kim Kardashian, Bruno Schiavi and Khloe Kardashian Odom arrive at the Kardashian Kollection Handbag launch at Hugo's on November 2, 2011 in Sydney, Australia. The Kardashian sisters will make an in-store appearance at David Jones tomorrow. (Photo by Lisa Maree Williams/Getty Images)

Television personalities sisters Kourtney and Kim Kardashian (R) arrive at the 20th annual Elton John AIDS Foundation Academy Awards Viewing Party in West Hollywood, California February 26, 2012. REUTERS/Gus Ruelas

Kim Kardashian attends "The Buzz On The Red Carpet" presented by QVC at Four Seasons Hotel Los Angeles at Beverly Hills on February 23, 2012 in Beverly Hills, California. (Photo by Joe Kohen/Getty Images)

Television personality Kim Kardashian arrives at the Clive Davis and Recording Academy Pre-Grammy Gala and Salute to Industry Icons in Beverly Hills, California February 11, 2012. REUTERS/Jason Redmond

Kim Kardashian and two of her sisters have been slapped with a US$5 million lawsuit alleging they and the makers of QuickTrim diet pills falsely touted the product's effectiveness for losing weight. The proposed class action lawsuit, which takes aim at the sisters' endorsement deal with the weight loss company, was filed in a NY federal court.