Jennifer Day

Our picks for events in and around Chicago this weekend, including Puerto Rican Fest, the first Juneteenth celebrations, and opening weekend for the Grant Park Music Festival in Millennium Park.

Also around the area this weekend, a big prize for fastest dinosaur at the Field Museum and a busy weekend at Ravinia Festival in Highland Park.

Also, around the area this weekend, a tour of R&B divas at the United Center and a plant giveaway at the Chicago Botanic Garden.

Also happening: Spider-Man is featured in a Museum of Science and Industry exhibit.

Also around the area this weekend, the annual Wright Plus Architectural Housewalk, based in Oak Park, and a host of notable speakers for Chicago Humanities Festival Lincoln Park Day.

Katy Perry: Fresh off her voyage to outer space, Katy Perry’s Lifetimes Tour touches down in Chicago. Expect her to “Roar.” Rebecca Black will also perform. 7 p.m. May 12...

Also around the area this weekend, comedian Laura Peek is at Zanies and the farmers markets open for summer.

Also around the area this weekend, Ivan Cornejo at the United Center, the Doc10 Film Festival and “The Goonies in Concert."

Also around the area this weekend, the Henhouse Prowlers celebrate an album release at Old Town School and Alton Brown’s culinary variety show comes to the Loop.