Kelsea Ballerini started writing songs as a little kid. By the time she was 21 she had a record deal. Now, at 28, she is a country pop music star with nearly 3 million Instagram followers. See her perform at the Country Summer Music Festival, where she leads a lineup that includes Blake Shelton, Chris Young, and Russell Dickerson. The festival runs Father’s Day weekend, June 17–19, at the Sonoma County Fairgrounds in Santa Rosa. One-day tickets are $85–$159; a three-day pass starts at $279. Find out more and purchase tickets at countrysummer.com.