Kings of Leon, Snoop Dogg Among Firefly Festival Lineup in Delaware

Organizers of the Firefly Music Festival in Delaware have announced this year's lineup but are still working to finalize a third headliner.

The lineup released Tuesday is led by Kings of Leon and the Killers. Other acts include Morrissey, Snoop Dogg, Foster the People and Modest Mouse.

One name not on the list is former Beatle Paul McCartney, who had been rumored for weeks to be this year's top headliner.

Attendance at Firefly has skyrocketed since the first event drew about 30,000 to the woodlands around Dover Downs International Speedway in 2012. Last year, some 80,000 fans showed up.

Chicago-based Red Frog Events, which founded the Firefly festival, teamed up last year with Los Angeles-based Goldenvoice, the group behind the Coachella music festival in California, to promote and produce Firefly.