Bonnie Raitt, Ziggy Marley, Melissa Etheridge, Cee Lo, Grace Potter, Steve Winwood, Los Lonely Boys - just a few of the big names who have performed during Saturday in the Park in Sioux City, Iowa.

This Saturday, July 4, 2015, this name trumps them all - Aretha Franklin! The Queen of Soul is this year's headliner at the annual event. The best part about Saturday in the Park? It is absolutely FREE.  No tickets are required, just show up and have some fun.

Another big name joining the lineup is Foster the People, best known for their hit, "Pumped Up Kicks."

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Here's the list of bands performing on the main stage:

12:05p - The Kelly Quinn Band
1:00 - Tribute to B.B. King
2:00 - Cedric Watson & Bijou Creole
3:15 - North Mississippi Allstars
5:00 - Gogol Bordello
7:00 - Foster The People
9:00 - Aretha Franklin

Hard Rock Hotel and Casino sponsors the event that is held in Grandview Park.

Although the music is the main focus, with two stages of entertainment, there are plenty of other things to do. There's a Kids Zone that is packed full of entertainers, inflatables, carnival rides, face painters and more.  Arts Alley features unique creations and handmade crafts from regional vendors. There are two beer gardens and plenty of food vendors.  The festival wraps up with a huge fireworks finale.