United Kingdom, March 25 -- Usher insists he doesn't have "anything negative to say" about Sean 'Diddy' Combs.

The 47-year-old singer has known the disgraced music mogul, 56, for decades, and has refused to condemn him as the rapper serves a 50-month sentence for a conviction on two prostitution-related charges.

Appearing on Forbes' The Enterprise Zone, Usher did some word association with senior writer Jabari Young, who asked for his one-word thoughts on influential people from his life.

When he was asked about Combs, the Nice and Slow hitmaker replied: "Legacy."

The writer referenced a 2015 interview Usher did when he said he "knew better" than to let himself get distracted by certain things on tour.

He added that the singer appear...