Hip-hop mogul Chris Lighty died Thursday morning after he shot himself during an argument with his ex-wife inside his Bronx apartment, sources told the Daily News.

Lighty, 44 — a longtime manager of 50 Cent, Diddy, Ja Rule and Mariah Carey — put a gun to his head and fired after a spat with his former wife, Veronica, inside the South Riverdale apartment about 11:30 a.m., police sources said.

Law enforcement sources said 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 his divorce.

Musicians began Tweeting about Lighty soon after news of his death spread.

“R.I.P. Chris Lighty,” posted Fat Joe on his Twitter account. “That man saved my life.”