Updated

A Minnesota teenager whose farewell song became a YouTube sensation has died after a fight with bone cancer.

Zach Sobiech died Monday at his Lakeland home. His mother, Laura, said on the CaringBridge website that he was surrounded by his family and girlfriend.

The 18-year-old was diagnosed with osteosarcoma in November 2009. When he learned last year he didn't have much longer to live, his mother suggested he write farewell notes to his loved ones. Instead, he wrote music.

His farewell song, "Clouds," has received more than 4 million views on YouTube in just two weeks. The song is on iTunes, with proceeds going to the Zach Sobiech Osteosarcoma Fund.

Zach's family is declining interviews but said in a statement they felt blessed by Zach's "amazing presence" in their lives.

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Online:

Zach Sobiech's "Clouds" video: http://bit.ly/UIGq9r