MUMBAI: Britney Spears's former husband, Kevin Federline, has received backlash from social media users after he slammed singer Beyonce Knowles, saying she resorted to botox and plastic surgery for her good looks.

Federline took to micro blogging site- Twitter to comment on the ‘Naughty Girl’ hitmaker's looks when she was attending a boxing match in Los Angeles on Saturday.

While many, including blog website Terez Owens, praised the 34-year-old superstar's good look, Federline begged to differ.

"She looked botoxed," Federline tweeted in response to Owens's tweet, reports aceshowbiz.com. But Federline did not stop there.

So sad when a beautiful woman chops and screws her face up w/Botox and surgery... #sawface

— Kevin Federline (@kevinfederline) November 22, 2015

This invited naysayers for Federline.

Many people criticised his reputation of leaning on Spears's fame and fortune back in 2004.

"@kevinfederline so sad when a boy takes a woman's hard earned money," a Twitter user wrote.

Another user took a dig at Federline's weight gain, writing: "@kevinfederline Sad when the only beauty in a man is in his body and he screws it and fills it with so much fat in it."

Federline was married for three years to the ‘Toxic’ hitmaker, and has two sons with her. He was her background dancer prior to their relationship.