Kourtney Kardashian with her vanished bump appears in swimwear with Kim and Khloe

Khloe, Kim and Kourtney in new swimwear

The Kardashian sisters Kim, Khloe and Kourtney now appear together with new swimwear as an ad for the kardashian collection swimwear clothing line (Sears Line). Most surprisingly Kourtney Kardashian is noticeably missing a baby bump, despite being three months pregnant with her second child at the time of the January photoshoot. The photo released just before it was announced the three sisters had made Forbes' list of "Most Overexposed Celebrities." 

Kourtney Kardashian, who is more than five months pregnant with her second child, poses sideways in a bedazzled bandeau-style two-piece and does not display a visible baby bump in the photo, which was shot by Nick Saglimbeni. The sisters posted the picture on their individual Celebuzz websites on Wednesday, more than two weeks ago they promoted their lingerie line.

Kim Kardashian stands in the middle and is wearing a navy blue halter bikini with ruffles. Khloe Kardashian dons a printed, retro-style bikini and is covered with a sheer wrap. It is unclear when the pictures were taken. A day later, on Thursday, Forbes released its list of Most Overexposed Celebrities, which places Kim Kardashian in the No. 1 spot. Kourtney Kardashian is No. 8 and Khloe Kardashian comes in 10th place.

Lindsay Lohan placed second. The former child star-turned Playboy cover model is trying to resurrect her acting career and was on Thursday taken off formal probation after five years of legal turmoil stemming from a 2007 DUI case.

The Kardashian sisters constantly post photos of themselves on Twitter. Kim Kardashian, who was also voted one of the least trusted celebrities of 2011 in a different poll, spurred her family's rise to fame after a sex tape starring herself and then-boyfriend Ray J was leaked online in 2007.

"Keeping Up With the Kardashians" debuted that year and spurred the spin-offs "Kourtney and Khloe Take Miami," "Kourtney and Kim Take New York" and "Khloe & Lamar."

Barbara Walters said on a 2011 ABC special titled "10 Most Fascinating People of the Year" that the Kardashians are "famous for being famous." The family, which earned $65 million last year, is also known for its slew of branded products.

The sisters launched a clothing collection for Sears in August 2011. In January 2012, they posed topless to promote for their denim collection, which is featured in three styles: The Kim, The Khloe and The Kourtney.

The sisters are tabloid favorites. Kim Kardashian dominated headlines late last year with a star-studded, "fairy tale" wedding to second husband, NBA player Kris Humphries, and her divorce filing 72 days later. He is seeking an annulment, citing fraud.

Kim Kardashian recently made headlines when a woman, said to be an animal rights activist, tossed flour on her at a Hollywood event. She was unhurt. Her sister Khloe, who posed nude for PETA in 2008, announced she was cutting ties with the group and accused it of lying by saying it was not behind the incident.