The Great South Bay Music Festival kicked off its four-night run in Patchogue Thursday night.
Christina Perri, Colbie Caillat and Rachel Platten each performed at Shorefront Park.
Rock group 311 is set to headline Friday's performance, along with the Mighty Mighty Bosstones.
Other acts including Lotus and Lou Graham - the original voice of Foreigner - are set to perform over the weekend.