Mutya Buena claims Jennifer Lopez "can't sing".
The 35-year-old pop star - who rose to fame as a member of the Sugababes - acknowledges that Jennifer is "sexy as hell", but she doesn't rate her singing talents.
Mutya said: "J-Lo, you can just shake your a*** crack. Let’s be honest, J Lo, she can’t sing.
"I’m not being rude. She’s an amazing performer, sexy as hell and looks great.
"But I’m not going to tell you J-Lo can sing. I’d be lying to you."
Mutya isn't impressed by Kylie Minogue's singing talents either.
Speaking during an Instagram Live, the pop star said: "I don’t think she’s a singer. She’s a great entertainer, she’s amazing at what she does, but singing is not for her.
"If you gave me a Kylie Minogue song except for 'Especially For You', what other song does she have?
"'Can’t Get You Out Of My Head'? You can sing that drunk and so can I.
"I don’t think I’ve ever bought a Kylie Minogue track in my life and I don’t think I ever would."
In fact, Mutya admitted to being unimpressed with most of the female pop stars of today, including the likes of Lady Gaga and Nicole Scherzinger.
According to The Sun newspaper, she explained: "I’m not going to sit here and pussyfoot around people just because I’m in the same industry.
"If you can’t sing, you can’t sing. I don’t go around saying I’m the best singer but I know I can sing.
"With me judging someone, I know I can back my talk. I need to have hairs sticking up on my arms. I’m not just going to listen to people that look cute. It’s all about the vocals.
"But there’s nothing wrong with using your body to compensate for something you don’t have."