Stevie Wonder performs at Apple HQ to celebrate Global Accessibility Awareness Day

Photo via Brennan Hall.

Wonder, who is blind, is known for hits including "Sir Duke," "I Just Called to Say I Love you," and "Superstition." Over his legendary career, he has had more than 30 top ten songs in the U.S., and he has been awarded 25 Grammys.

Friday morning, Apple Chief Executive Tim Cook shared a picture of himself and Wonder hugging onstage, while Apple employees cheer in the background. Cook thanked the "incomparable" artist "for lifting hearts and celebrating accessibility."

Global Accessibility Awareness Day has been around since 2012, taking place on the third Thursday in May.

Wonder has been an outspoken fan of Apple for years, calling attention to the accessibility features found in iOS during a concert back in 2011. In his remarks, Wonder thanked Steve Jobs for working to make technology accessible to everyone.

"There's nothing on the iPhone or iPad that you can do that I can't do," Wonder said.

The singer also appeared in Apple's Christmas commercial back in 2015.

In addition, earlier this week Cook met with James Rath, a legally blind filmmaker and YouTube star; Tatiana A. Lee, an actress and lifestyle blogger with Accessible Hollywood who was born with spina bifida; and Rikki Poynter, an advocate for Deaf awareness and closed captioning.

On Twitter, Cook said his conversations with Rath, Lee and Poynter were "great conversations about the importance of accessibility."

Finally, earlier this week Apple highlighted Global Accessibility Awareness Day with a series of videos entitled "Designed for Everyone." They showcased how real people make use of Mac, iOS and Apple Watch accessibility features such as Switch Control, Siri and VoiceOver.

Apple has a long history of working to make open accessibility a key feature of its hardware products and software development platforms.