Willie Nelson has another accolade to add to his list of great accomplishments.

According to KFDA, Ava Adams was born premature at 27 weeks. Following 12 surgeries within the first 15 months of her life, she was left with a feeding tube and a colostomy bag. Her parents, Brittany and Jamison, previously had a son die of the same condition two years before Ava was born, the television station reports.

Though Ava was confined to the neonatal intensive care unit in infancy, her parents were able to play music for her. The “On the Road Again” singer’s music in particular made a difference, according to KFDA:

"Any time she was having a bad day, you could play Willie Nelson or Johnny Cash or Ray Price and her stats would come up, she would start doing better just almost immediately," says Ava's father, Jamison.

Now, the 4-year-old carries her very own Willie Nelson doll wherever she goes, KFDA reports, and her parents directly credit Nelson’s music with improving Ava’s vital signs. They hope to make it to a Nelson concert soon: The station reports that Ava often yells “We need to go see Willie Nelson!”