Hip-hop bigwig Chris Lighty died after he shot himself during an argument with his ex-wife inside his Bronx apartment.  Lighty, 44 - a longstanding manager of 50 Cent, Diddy and Ja Rule - shot himself in the head after an argument with his former wife at about 11.30 am yesterday. The New York Daily News confirmed this with police sources.Law enforcement sources added that Lighty - who divorced his wife last year - may have been dealing with financial struggles, including owing about $5 million to the IRS.Lighty, founder of Violator Management, merged with another talent company to form Primary Violator around the time of his divorce.Musicians flocked twitter to pay tribute.Ice T wrote: 'Wow!  RT @clighty: Rest in peace to my main man The Grand Incredible Dj Scott La Rock. I am still Criminal Minded. 8/27/87''R.I.P. Chris Lighty,' posted Fat Joe. 'That man saved my life.'Russell Simmons tweeted: 'RIP Chris Lighty. Today, we lost a hip-hop hero and one of its greatest architects.'Justin Beiber’s manager Scooter Braun wrote, 'Hard to believe it is true but RIP to my friend Chris Lighty. Gone too soon.'Rihanna tweeted: 'Rest peacefully Chris Lighty, my prayers go out to family and loved ones. Dear God please have mercy.'Lighty was a leading figure in the music world from 1988 when he joined Russell Simmons and now-Warner chief Lyor Cohen at Rush Management.He said in a statement, 'I am deeply saddened by the loss of a hip-hop hero. Chris Lighty has been a dear friend of mine since he was a kid. He was a brilliant partner in business and I was so proud of all that he accomplished.’‘He was loved by everyone who knew him. He will be missed greatly by all of us.'Chris has worked with artists including Busta Rhymes, Q-Tip, Missy Elliott, Fantasia, Mya, Diggy Simmons, Ja Rule, Mobb Deep, LL Cool J and Nas.Page Six reported in November 2011 that he was hit hard by financial issues and divorce from his wife of seven years.An NYPD spokesman told Page Six, 'At 11.33 hours police responded to a person shot in the rear of 670 W on 232nd Street. When we arrived we found a male, 44, with a gunshot wound to his head.’‘A firearm was recovered nearby. He was declared dead at the scene. It is being investigated as a possible suicide.