110 Years of Frank Sinatra: Inside His Tight Bond with Sammy Davis, Jr., and the Painful Fight That Almost Ended It (Exclusive)

While Frank Sinatra and Sammy Davis, Jr. were longtime friends, a disagreement about drug use came between them.

Sammy Davis Jr.'s Friends Celebrate the Barrier-Breaking Entertainer, 100 Years After His Birth: 'A Light You Couldn't Look Away From' (Exclusive)

For what would have been his 100th birthday, PEOPLE spoke to some of Sammy Davis Jr.'s former friends and colleagues ...