Grace Kelly’s granddaughter also made an appearance at the spring ’18 show.
“The only way to achieve this is with someone who is like minded,” Rocky said.
The rapper’s street style includes a vintage ’90s baseball jersey.
Keys’ 13th annual soiree raised $2 million for children and families with HIV in Africa and India.
The rapper was tapped for the campaign along with Larry Clark, Rod Paradot and Dylan Roques.