Lee “Q” O’Denat, founder of hip-hop website WorldStarHipHop, has died at 43.

According to TMZ, he died in his sleep Monday night. A cause of death was not immediately available, but TMZ cited one source as believing it may have been linked to a heart attack.

Q founded WorldStar in 2005. It has since evolved from solely hip-hop videos to viral clips and other outrageous footage.

In a 2013 interview, Q said WorldStar simply covered "anything relevant of the day," with the intention of not being "like other boring hip-hop sites. I wanted to push buttons, you know. Because hip-hop is known for that."