Chris Brown has been challenged to a wrestling match for charity by wrestler CM Punk.

The Turn Up the Music singer and the WWE champion became involved in a Twitter feud after Punk said that he wanted to "curb stomp that turd" Chris for assaulting then-girlfriend Rihanna in February 2009.

R&B star Chris rose to the bait and mocked Punk — real name Phil Brooks — and suggested he took steroids.

He tweeted: "@CMpunk needs more followers. He's such a leader! Not to mention the roids hes on has made it utterly impossible for him pleasure a women.

"@CMpunk contact my assistant and I'll have em send u an autographed pic for my biggest FAN! (sic)"

Punk then posted a video online to tell the 22-year-old singer that he is "not a man" – and challenged Chris to a charity fight, with all proceeds from the bout going to a women's shelter.

Punk (33) says: "I'm a life-long, proud, drug-free straight edge individual so Chris and I come from two completely different worlds. I don't have a manager, I don't have a bodyguard, I don't have an assistant, I have no need for a PR team what to tweet or when to delete tweets and I don't hit women. Period.

"In my world women are to be revered and respected and I firmly believe that in this life there are consequences and repercussions for people's actions and I don't think Chris has paid for what he's done. Picking up trash on the side of a highway does not make amends for repeatedly striking a woman in her face and sending her to hospital.

"So if Chris wants to throw stones my way now I say that's fine let's put some gloves out and get in the ring and I will choke you out and I will make you feel as weak and as powerless and scared and alone as any woman who has had the misfortune of knowing a sad, cowardly, little boy such as yourself and all proceeds can go to a women's shelter of my choosing ...

"Chris Brown isn't a man and that's fine. I just know that someday, somewhere somehow, somebody will put Chris Brown exactly where he belongs and that obviously doesn't have to be me I would just really like it to be."

Chris — who was sentenced to five years probation and six months of community service after he violently attacked Rihanna on the eve of the 2009 Grammy Awards – has accepted the RAW star's challenge but did mock the wrestler's video in another series of Twitter messages.

He wrote: "@cmpunk the video u just posted was cute! It's so funny how defensive u are.

"And the fact that I really don't know who you are and could give a shit is the funny part!

"I miss the real wrestlers! (Hacksaw Jim duggan, Brett the hitman heart, coco beware, rowdy roddy piper) #Notnopunks (sic)"