WorldStarHipHop founder Lee “Q” O’Denat has died, TMZ reports. He was 43 years old. He died in his sleep on Monday night, according to TMZ. O’Denat started WorldStar as a mixtape-hosting site in 2005. Ultimately, the site gained notoriety as a video aggregator, posting a variety of clips, notably fight videos. The term “WorldStar” has become shorthand for a moment that needs to be captured on video. It’s been used on HBO, and Childish Gambino framed a song around the phrase. Find a statement from the WorldStarHipHop staff about O’Denat’s passing below. Update (1/25, 9:35 a.m.): O’Denat died of heart disease, according to the San Diego County coroner’s office, the Los Angeles Times reports. He was pronounced dead at 5:30 p.m. Monday.

In a 2015 New York Times profile, O’Denat explained his vision for the site. “Hip-hop is for the sex, the drugs, the violence, the beefs, the culture,” he said. “That’s the competitiveness of hip-hop, so I felt like the site needed to be R-rated.”

In addition to its aggregated content, WorldStar has hosted countless music videos for artists including Migos, Young Thug, Fetty Wap, Future, and more. A new show inspired by the site, “World Star TV,” is set to air on MTV2 next month.