The country music star was a teenager when his older brother Chris died in a car accident, and Luke has now opened up about how the tragedy helped drive his ambition and success.

"When Chris passed away, I was 19 years old, fixin' to chase my dream, and it just totally rocked our family's world, rocked my world," the 40-year-old said on Sunday Today With Willie Geist. "It makes you appreciate chasing dreams... You're like, 'Hey, you get one go round at this thing called life, so you better go after your dreams.'"

Luke had previously spoken about Chris' death in 2013, when he told ABC News, "I'm kind of hyperventilating talking about it... You never truly... move beyond it."

The singer lost his sister Kelly in 2007 and her husband Ben in 2014. After his death, their youngest son Til moved in with Luke and his wife Caroline and their two sons Bo and Tate.

He was hit with further tragedy in February (17) when his infant niece passed away. Sadie, the daughter of Caroline's sister, Ellen Boyer, had been dealing with a series of health and internal issues since birth.

Luke's full interview airs on Sunday (02Apr17) ahead of the Academy of Country Music (ACM) Awards, which he is co-hosting with Dierks Bentley.