AceShowbiz - Former hip-hop couple 50 Cent and Ciara sparked controversy at the weekend, when the pair became embroiled in a vulgar online feud on Twitter.com. The rapper logged on to the microblogging website after a party at Hugh Hefner's Playboy mansion on Friday night, January 28, and his remarks appeared to set off a firestorm from his former partner.

He wrote: "I just left the play boy mansion. I think I want to be a pimp now. Sh*t I have strong pimp qualities. Lol... I'm looking for girls to start my new line of work. Are there any strong potential hoe's on tweeter right now. Lol."

Minutes later, Ciara tweeted: "The things people tweet say a lot about their character, pay attention!" prompting the rapper to fight back: "Yea I tweet things that reflect my character b*tch. I have a sense of humor get one.lol that's why your 3 mill followers behind me" - and fans then began to weigh in on the feud online.

But 50 then appeared to try and calm the spat down, writing, "Ciara now I'm not going back n forth with you on twitter now cut it out." The pair dated back in 2007.