The Billboard Hot 100 Festival is back and bigger than ever. Taking place at the spectacular Jones Beach Theater, an amphitheatre which is perched on the edge of Zach Bay, this two day event always attracts the biggest names mainstream American music, and this year's no exception. Headlining are rapper Big Sean, Major Lazer, who is still riding high on the success of 'Lean On', and superstar DJ Zedd.