Keenan Cahill, a popular YouTube creator who made lip-sync videos with celebrities like 50 Cent, Katy Perry, Justin Bieber and more, died on Thursday after open-heart surgery on Dec. 15.
On his YouTube account, which has roughly 721,000 subscribers, Cahill’s videos have garnered more than 500 million views.
He posted his first lip-sync video in August 2010 to Perry’s “Teenage Dream,” which has reached 58 million views.
A year later, the pop star met up with Cahill in person and they filmed a video together.
Cahill’s most popular video was with 50 Cent, where they lip-synced “Down on Me,” to the tune of 60 million total views.