Bubba Knight, Yolanda Adams, Dionne Warwick and Stevie Wonder join Gladys Knight as she performs some of her greatest hits; later, Gladys shares Apollo memories.

Brothers Ronald Isley and Ernie Isley of the legendary group The Isley Brothers take the stage at Apollo Theater to perform their catalogue of musical hits known to powerfully intersect the gospel, R&B, rock, soul, funk and disco genres. With an unprecedented seven decades in the industry, the group proves why their soulful sound continues to reverberate through contemporary music.