David Letterman's former bandleader partners with Jon Batiste and Stay Human, Valerie Simpson for "Ain't No Mountain High Enough"
Retired late-night host and longtime bandleader Paul Shaffer were guests on Sirius XM's Outlaw Country station
Easter egg-packed video is latest single of former 'Late Show' bandleader's upcoming new LP
Comedian and Sofia Coppola reteam for Miley-singin', Clooney-swingin' yuletide party 'A Very Murray Christmas'
"Alone on Christmas Day," which appears in Murray's Netflix holiday special, was written by Beach Boys in 1979
Bill Murray's all-star "homage to the classic variety show," directed by Sofia Coppola, debuts in December
Elvis Costello, Joan Jett, Paul Shaffer and Steven Van Zandt also appear in iconic singer's "Forbidden Nights"
"I'm not retiring as many people have assumed," says the musical director. "I'm excited about the fact that after almost 33 years, my schedule will open up a little bit"
Robin Sparkles makes triumphant return alongside Canada's biggest stars
Clapton and the Who dig deep; Billy Joel returns sounding better than ever
'Late Show' musical director's contract is up in two years
Stars reflect on the Band drummer-singer's legacy