So how do they do it?  "You know, we just stay positive. I think people expect that from me," he said. "I have to pray that people that have had similar situations can maybe look at my family and see me positively dealing with it. I'm not saying it's easy."

Sadly, Luke lost another sibling, his older brother Chris, to a car crash in 1995. "My only siblings, you know, gone from the world in a flash in two different crazy tragic manners," he reflected.

He's gotten a lot of support from the country music industry. On the night of his brother-in-law's funeral, Chris Stapleton and Lady Antebellum performed Luke's hit "Drink a Beer" on the CMT Artists of the Year special. As Luke told ABC News, watching that on TV with his family "was a big-time healing moment."

The singer is continuing to put family first as he moves forward with his successful music career. His new album, Spring Break...Checkin' Out, is set for a March 10 release, and the 2015 leg of his That's My Kind of Night tour kicks off next week.

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