Kelsea Ballerini will celebrate 2019 by headlining Dick Clark’s New Year’s Rockin’ Eve event on the West Coast with a number of other artists, including The Chainsmokers, Foster the People, Dua Lipa, Macklemore, Skylar Grey, Ella Mai and Charlie Puth. Ryan Seacrest will host the five-plus-hour event from New York City, while Lucy Hale will…