WGN reported that YouTube star Keenan Cahill died on Thursday at age 27, two weeks after having open heart surgery, according to a spokesperson from his family.

Cahill came onto the scene in 2010 when he began posting lip-sync videos to his YouTube channel as a teen. He was one of the first YouTube sensations that arose during that time.

He drew the attention of Jimmy Kimmel and Katy Perry, and had numerous celebrities appear on his channel in duets with him once he became popular.

Over the years, he worked with rapper 50 Cent, Jennifer Aniston, Nick Cannon, Justin Bieber, Ariana Grande, Brittney Spears, Jason Derulo, Cody Simpson, Andy Grammer, David Guetta, the New York Knicks, and many more.

Celebrity sensation

Cahill was featured in Sara Bareilles’ music video for “Uncharted” alongside Adam Levine, Pharrell Williams, Josh Groban, and others.

He also released some of his original music on the channel in recent years. His last original single, "Rain" with Jillian Jensen, was released just three weeks ago.

His videos had a total of over 500 million views, and he was one of the first YouTube personalities to reach that mark. He is estimated to have made several hundred thousand dollars or more on his videos over the years.

Cahill suffered from the rare genetic disorder Maroteaux-Lamy syndrome, a progressive condition that can cause tissues and organs to enlarge, become inflamed or scarred, and eventually waste away, according to MedlinePlus. Heart valve abnormalities are a common part of the syndrome.

Most people with Maroteaux-Lamy syndrome don't make it past their teens, so Cahill lived unusually long for someone with the disease. Still, many fans mourned his loss and expressed that he was gone way too soon.

His last post

He had posted on social media that he was having open heart surgery on December 15.

 

View this post on Instagram

 

A post shared by Keenan Cahill (@keenancahill)

It would be his last post until his death two weeks later as fans wondered what had happened with the surgery and its aftermath.

TMZ reported that there were complications from the surgery and Cahill was put on life support. He was taken off life support on Thursday just before he died.

His profile was filled with comments and condolences after his death was announced, with one fan writing, “Rest In Peace Keenan. Thanks for all the fun you brought to our lives."