Kim Kardashian of Keeping Up With the Kardashians is still celebrating her 40th birthday. After sharing her surprise party last week, the reality star took to social media to share a steamy bikini pic in honor of her milestone. But, it turns out her fans weren't feeling it.

Last week's episode of KUWTK gave viewers an inside look at a surprise birthday bash Kim's family threw her in celebration of her 40th birthday. Kanye West spun some unreleased tunes with the DJ, while Khloé Kardashian and Tristan Thompson teased their rumored reconciliation in the photo booth. Kim's birthday milestone comes after she announced the final season of KUWTK early last month. The show has followed Kim's rise to fame since 2007, when season one premiered. But the birthday party wasn't the last of Kim's celebration.

Related: KUWTK: Fans Slam Khloe For Getting Back With Tristan & Not Forgiving Jordyn

In true Kim K fashion, the KKW Beauty founder had to show off what she's working with through a 40 and fabulous bikini pic. "This is 40!," she captioned a pair of beach photos she posted on Instagram and Twitter. But many of her own fans and followers responded by trolling Kim for her long-history of dodging plastic surgery rumors. "This is 40 with all that work done to ya," one Instagram user wrote in a comment that received over 5,000 likes. "No that’s plastic surgery and money," wrote a Twitter user, The News reports. Another fan shared a picture of the SKIMS founder where she didn't look as stellar and included a caption that read "unedited photo btw." 

See Kim's 'This Is 40' Bikini Pic On Instagram

Despite all the shade and harsh criticism, there were many who showered the mother of four with praise. "You never looked better," said an admirer of the TV personality. "Better than ever," another wrote on Instagram. Kim is no stranger to criticism over her physical appearance. She, along with her famous sisters, have been the target of backlash and speculation over their constantly-changing appearance. Khloé recently joked about the many makeovers when she recalled being Nicole Richie's personal assistant back in the day. While talking about the old job, Khloé admitted she worked with Richie about "five faces ago."

Kim's youngest sister Kylie Jenner has admitted to receiving lip fillers over the years. However, fans continue to criticize the famous family for getting more than fillers done to their bodies. Kim is coming fresh off the heels of her appearance on David Letterman's Netflix show My Next Guest Needs No Introduction, where she became emotional discussing her 2016 Paris robbery.

Next: KUWTK: Rob Kardashian Makes Rare Appearance On Show For Kim’s Birthday

Keeping Up With the Kardashians airs Thursdays at 8 pm ET on E!

Source: Kim KardashianThe News