The legendary soul singer has known Beyonce for years, but believes her acclaimed new record is in a class of its own.

"I've seen Beyonce from the very beginning of her career when she was with the group (Destiny's Child)," Stevie told Billboard.com. "Then her as a single artist and I listened to the music mature. Now we have Lemonade, which is to me a great art piece."

But Stevie did have one suggestion for the superstar - making her art more accessible for disabled people.

"If I were to say anything to her, I'd say, 'Look why don't you get the words written in braille so that every single person can read the words?," he suggested.

Stevie has been a longtime advocate for universal accessibility for disabled persons, even calling for reform while presenting at the Grammy Awards earlier this year (16).

The 25-time Grammy winner took to the stage with Pentatonix to pay tribute to the late Maurice White by singing an a cappella version of Earth, Wind & Fire's That's The Way Of The World.

Following the moving performance, Wonder and Pentatonix presented the prize for Song of the Year, with Wonder holding the winning envelope in his hand.

"I'm gonna pop this open! Y'all can't read this huh? You can't read braille?", Wonder said with a taunting voice.

The soul icon then told the crowd at Los Angeles' Staples Center, "I just want to say that we need to make every single thing accessible to every single person with a disability."