Willie Nelson ended a concert early in Salt Lake City last Sunday at the USANA Amphitheatre.

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The 84-year-old country legend was experiencing breathing problems, Billboard reported. Nelson would later take to Twitter to assure fans that he was OK and blamed the high altitude.

"This is Willie I am sorry to have to cut the SLC show short tonight The altitude got to me I am feeling better now & headed for lower ground," he tweeted.

The incident is the latest health scare for Nelson after his publicist denied a report in March about the singer being deathly ill and after he canceled a weekend of shows in Las Vegas in January due to illness.

Nelson also delayed the start of a joint tour with Merle Haggard in October 2015 also citing illness.

Nelson addressed various online hoaxes about his death on his song "Still Not Dead" from his latest album released in April, God's Promblem Child.