Promoters at Live Nation alerted locals to the event via social media, and hundreds of fans raced to the D.C. Armory Mall on Monday morning to catch the Superstition hitmaker in concert.

The first 1,000 people in attendance were treated to free doughnuts, and during the hour-long event, Wonder discussed plans for his new Curb the Bullet campaign, which aims to bring an end to gun violence.

The blind singer, 65, then headed to his next stop in Philadelphia, where he hit the stage at the city's Dilworth Park at 3pm local time, as hundreds of fans braved the heat and humidity to see the music icon in person.

The gigs, designed to promote Wonder's upcoming Songs in the Key of Life Performance tour, wrapped up with a third set in New York's Central Park on Monday night.