If Linda Perry ( singer: 4 Non Blondes/songwriter ) isn't taking jabs at Katy Perry which she has, Pop star and 1 hit wonder Kelis is.

Lets take a lock back at Kelis' career shall we?.... Not a very long journey.

Katy Perry's career: 5 number 1 singles off 1 album.

Sure Kelis your "Milkshake" may have brought all the boys to the yard, but Katy's career will ALWAYS be "Better Than Yours"

R&B singer Kelis is not a fan of "California Gurls" hitmaker Katy Perry.

According to Britain's Daily Star newspaper she said, "Katy Perry is crap. It's just poor pop. Her name might be on her stuff but that doesn't mean it's any good."

Maroon 5 and Christina Aguilera recently ended Perry's record-breaking run at the top of the U.S. pop chart

via Kelis: 'Katy Perry Is Crap' - Starpulse.com.