Kelsea Ballerini's Must Haves: From a Pilates Machine to a Louis Vuitton Duffel Bag

Ballerini loves indulging in a Sonic Ocean Water Soft Drink ($4) from time to time because it carries a certain sense of nostalgia for the singer — and is endlessly refreshing. "I actually have very real memories growing up with Sonic. My high school in Knoxville was like 0. 3 miles from a Sonic, and it's one of those sensory things where when I taste an Ocean Water, I taste high school — it's such a strong memory for me," Ballerini tells PS.

Pro Tip: An Ocean Water isn't the only thing Ballerini likes to add to her Sonic order. "They have really good tots and they have really, really good chili dogs. If I'm in a specific mood, I will roll up and get a chili dog, without question," she says.