Remember that awesome super-festival that premiered in Central Park last time in the name of fighting international poverty and listening to kickass music? Yeah, we do. And it’s happening again.

The second annual Global Citizen Festival will be held this Saturday, Sept. 28 in Central Park, and the headliners include Stevie Wonder, Kings of Leon, Alicia Keys and John Mayer. But even with a fabulous lineup like that, it seems that the fest wanted to add one more favorite to the bill: Elvis Costello. Costello will be performing a short acoustic set at the fest. Celebrities like Gerard Butler, Katie Holmes, Olivia Wilde, Freida Pinto, Russell Simmons, Bridget Moynahan and will.i.am are also scheduled to appear at the event.

The fest is organized by Global Poverty Project, and last year’s event, which featured Neil Young and Crazy Horse, Foo Fighters, the Black Keys, John Legend and Band of Horses, drew 60,000.

“What the Global Poverty Project and its Global Citizen movement have accomplished in just five years is really inspiring,” Mayer said in a statement. “Their mission to end extreme poverty is one that we can all agree on, all support. I’m excited to be part of this year’s program, alongside musicians I admire and working to end extreme poverty within a generation.”

Just like last year, the festival is free, but attendees got tickets by performing humanitarian acts and raising awareness of global poverty, which then qualified them to enter a lottery for tickets. If you won’t be out in Central Park for the show this Saturday, you can still watch the event as it’s broadcast on TV and online. You can visit the Global Citizen Festival website for more information.