NEW YORK (Reuters)- Pop sensation Justin Bieber, the subject of some unflattering headlines in recent years, suffered the slings and arrows of fellow entertainers, from Kevin Hart to Martha Stewart, as they skewered his looks, music and public antics during a celebrity roast broadcast on Monday.

Comedy Central's Roast Of Justin Bieber, hosted by Hart, got off to an edgy start, with Hart joking that most of Bieber's fans "are either in middle schools or standing at least 500 feet away from one".

The host was also joined by Natasha Leggero, Pete Davidson, Shaquille O'Neal, Snoop Dogg, roast veteran Jeff Ross, Chris D'Elia and Ludacris in lambasting Bieber, 21, over a two-hour special taped in Los Angeles earlier this month.

In keeping with the long tradition of celebrity roasts, off-colour, politically incorrect and borderline offensive jokes were the order of the day, mining everything from the Sept 11 attacks to the Holocaust for humour. The N-word was in wide use.

Snoop Dogg referenced one of Bieber's headline-making escapades involving the singer's pet monkey.

"That monkey was more embarrassed than the one that started the Aids epidemic," the rapper joked.

The roasters targeted each other as much as they did Bieber, with cracks about Hart's diminutive stature, O'Neal's weight and appetite and the advancing ages of Stewart, Ludacris and Snoop Dogg, as well as Stewart's prison record.

But they saved their sharpest barbs for Bieber.

Stewart told him: "You need to settle down, bring some balance into your life, find yourself the right gal but she'll have to be someone on your level, someone powerful and famous and rich, someone you can smoke a joint with or indulge in the occasional three-way. I'm talking about a playa in the board room and a freak in the bedroom.

"So Justin, my final piece of advice is, call me."

Bieber mostly chuckled at the jokes and occasionally clapped. He got the last word, however.

He said he was "new to comedy, but here's a joke, all right? What do you get when you give a teenager $200 million? A bunch of has-beens calling you a lesbian for two hours."

Turning serious, he noted he was "thrown into this at 12 years old" and that "through it all, I lost some of my best qualities. For that, I'm sorry,"

Vowing to "turn everything all around", he said: "You have my word I will not end up broken, pathetic, bitter - or sitting on the dais at somebody else's roast."