United Kingdom, July 24 -- Stevie Wonder's "heart is broken" following the death of Malcolm-Jamal Warner.

The 75-year-old singer admitted he is devastated after Warner, 54, died in a drowning incident in Costa Rica at the weekend.

He told TMZ: "My heart is broken because not only was he a talented man growing up and doing The Cosby Show, but even more important his commitment was telling the story, the truth.

"And for me, in a time where we have so many in high places telling low-down lies, we need the truth. So yeah, I miss him.

"I hope that the writers, the singers, rappers will begin to spread messages of positivity, of hope, and us moving this world forward. I'm quiet, but my heart is hurting."

Wonder went on to make a cultural c...