Beloved standards singer and GRAMMY Hall Of Fame-er Johnny Mathis has a longstanding friendship with pop great Dionne Warwick, both of whom were recently on hand at the GRAMMY Salute To Music Legends. 

Honoring Warwick with a rendition of her early '60s classic "Walk On By," Mathis told the Recording Academy a little about what makes their friendship so special.

"My dear, dear friend Dionne Warwick is one of the greatest entertainers of all time," he said. "I guess it may be a secret, but the house that I lived in in Beverly Hills, Dionne Warwick bought it and lived in it after I decided to move! 

But more than that, we have had tours all over the world singing together, in tandem sometimes. She's a dear friend and a brilliant artist, and it's a pleasure to be on the stage with her again."

Preview Mathis' performance above, and don't forget to watch GRAMMY Salute To Music Legends on Fri., Oct. 18 at 9 p.m. on PBS (check your local listings).

Watch: Lalah Hathaway Honors Late Father Donny Hathaway In Moving GRAMMY Salute To Music Legends Performance