The singer was joined by Academy Award-winner Troy Kotsur, who delivered an ASL rendition of "The Star Spangled Banner."
The Abbott Elementary actress is the first Black person to perform the Black national anthem on the field before the Super Bowl.
His wife, three children and friends, including Ellen DeGeneres, gathered to honor the late dancer, choreographer, actor and producer.
The documentary is set to premiere later this month on Weverse and Disney+.
"She could just walk out in sweatpants and sing, and that would be just great," he said of her upcoming Super Bowl performance.
Swarm is set as the opening-night TV premiere at the SXSW Film & TV Festival on March 10.
The yearly Academy Awards event raises money for John's charity, aiming to bring an end to HIV/AIDS.
"A lot of people go through this, and they go through it in silence," the singer said on the Jennifer Hudson Show.
So, like, apparently, Kyle runs Hollywood or something?
The singer said he "wanted to share my story 'in my own words.'"
