It's summer — time for outdoor fun — and Naturally Chicago invites you to join us for something completely different: an evening on the lawn of Millennium Park's Jay Pritzker Pavilion to watch Shemekia Copeland, regarded by many critics as the greatest blues vocalist of our time.

The event takes place on Monday, July 31, and admission is free. The concert begins at 6:30 p.m. A Naturally Chicago scout team will arrive early to stake out space, but it's recommended that you arrive early to make sure you can sit with the group. We're asking you to register so we can make an email list and send out information about where to find our group on the Pavilion lawn.

And if a picnic on the lawn suits you, you can bring in your own food and non-alcoholic beverages (there are also concession stands on site that serve alcohol).

The concert will open with the Martha Redbone Roots Project. The event site says, "Martha Redbone, a vocalist, songwriter, composer, educator, along with her longtime collaborator and husband Aaron Whitney and family band of funkateers, play Afro-Indigenous Americans music" that "gives voice to social justice issues and celebrates the human spirit."

As for Shemekia Copeland, if you know you know. If you've never seen her perform, you owe it to yourself.