In January 2018, Lynne appeared on Today with Oscar, performing "Who's Lovin' You". In March, she appeared on the Grand Ole Opry and made a cameo appearance on the Nickelodeon Kids' Choice Awards, and then returned to Little Big Shots in April as "a Little Big Shots legend", where she performed "Shout" by the Isley Brothers with Oscar. In May, she appeared as a guest on Pickler & Ben. In July, she participated in the 2018 Starkey Hearing Foundation gala. In August, she returned to AGT as a guest performer, singing "Show Off" from The Drowsy Chaperone with Petunia. In September, she appeared as a guest in an episode of Kids Baking Championship. In November, she was a guest on Steve, where she performed "Rudolf the Red-Nosed Reindeer" with Petunia, and later sang "Jingle Bell Rock" with Petunia during NBC's Christmas in Rockefeller Center telecast. In December, she returned to both the Grand Ole Opry and Pickler & Ben, and voiced Daisy in an episode of Fancy Nancy.
In October 2018, Lynne announced a second tour starting in February 2019, Darci Lynne and Friends: Fresh Out of the Box. In March, Lynne appeared as a guest for two stops of the Barbie 'Be Anything' Tour. In April, she appeared in a WE Day event in Washington.