Singers José Feliciano, Anastacia, Álvaro Soler and Dee Dee Bridgewater visited him at the Vatican.
It is the fourth trip planned so far for 2019. It will be from May 5-7.
The Vatican will hold a special celebration for the patroness of America.
Current U.S. President Donald Trump named Dec. 5 the national day of mourning for the former president.