Daughter Aisha Morris sang backup on most of the songs, and sang a jazz-inflected number. Her clear, whispery voice was pleasant and charmed the crowd. Before she returned to the backup singer area, Wonder serenaded her with “Isn't She Lovely,” which he wrote about Aisha as a baby. She beamed but seemed slightly embarrassed; the crowd seemed enchanted by the duo, even joining in on some of the lyrics.

After asking the audience if anyone had ever made love to one of his songs, he launched into his ultra-romantic “Ribbon in the Sky,” a favorite of the crowd. The romance continued with In Square Circle's “Overjoyed,” a ballad that has gained popularity 23 years after its initial release. Rocketing back in time, Wonder performed a particular “Chicago favorite”-- “Hey Love,” a 60s hit that delighted the older members of the audience. Other longtime favorites followed, such as “My Cherie Amour” (the audience sang much of the lyrics) and “Signed Sealed Delivered,” where Wonder's voice sounded exactly like the original recording.

Returning to Songs in the Key of Life, perpetual favorites “Sir Duke” and “I Wish” turned the entire venue into a party, with young and old dancing in the aisles. Although the band played these classics admirably, the horn section could have been bigger to really flesh out the crucial horn parts. Curiously Wonder threw in an obscure number from 1987's Characters, “My Eyes Don't Cry.” Lacking a kazoo, he asked the audience to sing that part.

Returning to more familiar fare, he once again inspired the audience to dance with 1982's “Do I Do.” At one point he even stood on the piano bench, directing the audience to sing and clap along. After jumping off the bench, he played the megahit “I Just Called to Say I Love You,” followed by “I Was Made to Love Her,” again showing how little his voice has changed over the years.

By the time he launched into perennial favorite “Superstition,” the entire audience was grooving to the beat. “I've got to go home!” Wonder exclaimed, but fans were in no hurry to have him conclude the show. Backed by a top-band (featuring superior bassist Nathan Watts), Wonder rewarded longtime fans with an almost three-hour performance that barely scratched the surface of his expansive catalog. Yet the ebullient Wonder barely broke a sweat, full of energy from start to finish. Judging by the crowd reaction, he accomplished his goal: bringing joy and unity to a diverse crowd. Here's hoping he won't wait another 20 years to return to the Taste of Chicago.