A new report has indicated that Jennifer Lopez is upset over the attention that Kim Kardashian and her butt has received. 

According to tabloid, National Enquirer, sources revealed that Lopez is blasting the Keeping Up With The Kardashians reality star for having fake assets. 

"Jennifer is sick of all the talk about Kim's butt and how much attention she gets for her curves," a source said. "She thinks it's pathetic, because she believes it's blatantly obvious Kim's had some type of lift or treatment to get such a gigantic bottom that sticks out like it does."

The source added that Lopez is proud of her natural body and thinks there is too much attention centered on Kardashian.

"Everything about Jenni­fer's body is natural. She's proud of her shape and the work she's put into it through years of sweat and dedication in the gym."

"She's old-school about this stuff and doesn't think Kim deserves all this adulation when she's so plastic and such a total fake," the source said. 

Kardashian has always denied butt implants and plastic surgery, most recently since she have birth to her daughter, North West last year. 

Back in February, Kardashian took to Twitter to slam the tabloids for producing false stories about her post-baby body.

"I'm seeing all these nonsense tabloids claiming I have butt implants-injections. Using pics of me 15lbs skinnier (before I had my baby) comparing me to now! I still have weight to lose. Anyone who has had a baby knows how hard it is to lose weight (especially the last bit of weight) & your body totally changes! Making fun of me pregnant & making fun of me trying to lose weight now shame on you. I'm not perfect but I will never conform to your skinny standards sorry! Not me. And BTW I've lost a lot so far & I'm proud of that! Don't give young girls a complex!" she wrote at the time.