He sang a 2022 duet of "Hold Me Closer” with Britney (5)
I believe the answer is:
elton
(Other definitions for elton that I've seen before include "- John, British singer" , "Ben --; -- John" , "One John" , "Sir ___ John, singer-songwriter" , "First name of singer/songwriter born Reginald Dwight in 1947" .)