Keenan Cahill dead at age 27: The Youtube sensation was famous for his lip sync videos

Keenan Cahill has reportedly died at the age of 27. 

The YouTube sensation – famous for his lip sync videos – passed away on Thursday according to a family spokesperson, as per WGN. 

Though a cause of death has not been revealed, Keenan, who was diagnosed with Maroteaux–Lamy syndrome, shared two weeks ago that he was undergoing open heart surgery on December 15. 

Gone too soon: Keenan Cahill has reportedly died at the age of 27. The YouTube sensation passed away on Thursday according to a family spokesperson; Pictured 2013

‘For those who are asking. December 15th is the date of surgery,’ he wrote on what is his last Instagram post on December 12. 

On December 5th he also shared a post that read: ‘One week till open heart surgery. Wish me luck. Love ya’ll.’ 

Maroteaux-Lamy syndrome is a ‘progressive condition that causes many tissues and organs to enlarge, become inflamed or scarred, and eventually waste away’ according to MedlinePlus. 

Last post: Though a cause of death has not been revealed, Keenan, who was diagnosed with Maroteaux–Lamy syndrome, shared two weeks ago that he was undergoing open heart surgery on December 15

Beloved: Born in Elmhurst, Illinois, Keenan rose to fame with his entertaining clips, which drew the attention of celebrities including Jennifer Aniston, Katy Perry, Justin Bieber and more

Born in Elmhurst, Illinois, Keenan rose to fame in 2010 with his entertaining clips, which drew the attention of celebrities including Jennifer Aniston, Katy Perry, 50 Cent, Nick Cannon, Justin Bieber and more, who appeared on his channel to do duets. 

Aside from his YouTube career, Keenan was also featured in Sara Barilles’ music video for Uncharted, along with Adam Levine, Sia, and Ryan Tedder.

Cahill also performed with American electronic dance music duo LMFAO onstage at the 2011 American Music Awards.

Popular: Cahill also performed with American electronic dance music duo LMFAO onstage at the 2011 American Music Awards; Pictured with David Hasselhoff at the AMA’s 

His popular YouTube videos had over 500-million views. 

Other guest artists on his channel have included Maroon 5, Flo Rida, 50 Cent, Jason Derulo, Gym Class Heroes, Cody Simpson, Tinie Tempah, The Wanted, Big Time Rush, Glee and more. 

He has also released a number of his own original singles on iTunes.