Powerhouse YouTuber Keenan Cahill, known for his videos of celebs lip-syncing, has passed away.

On August 28, 2010, Cahill posted his first lip-sync video to YouTube, with the Katy Perry song Teenage Dream. His channel has featured performances by Jennifer Aniston, 50 Cent, Flo Rida, Katy Perry, Tinie Tempah, Maroon 5, Cody Simpson, Jason Derulo, Big Time Rush, Glee, The Wanted, LMFAO, Drake Bell, Justin Bieber, Gym Class Heroes, Xuso Jones, WWE wrestler The Miz, and Pauly D among others. A lot of his singles were also made available on iTunes.

Cahill had Maroteaux-Lamy syndrome, which in his instance caused him to have an appearance resembling that of people with dwarfism (Cahill was 127 cm tall), with thickness of the dura, shortened trunk, hunched stance, restricted joint movement, and larger hands.

According to Keenan’s manager, David Graham, he underwent open heart surgery on December 15; however, due to complications, he was placed on life support.

Keenan was taken off life support on Thursday afternoon in a hospital in Chicago, according to reports.

Where will Keenan Cahill be buried?

There are no details of his burial site yet.