"Those sessions were the most amazing, paramount thing I've ever seen," says Lawrence "Boo" Mitchell, Willie's son and associate producer of the album. "Al is such a master of his voice – he was walkin' and dancin' all around that vocal booth, but you can still hear every note just perfectly."

Indeed, I Can’t Stop shows that Green’s vocal dynamism is as powerful as ever. He gets the spirit for the R&B strut of "Play to Win" and the soul-clap groove of "I've Been Waitin' on You," and he turns up the passion for "Million to One" and the pop-infused "I'd Still Choose You." He does some soul-searching on the album's slower tempos, digging deep on the achingly beautiful "Rainin' in My Heart," pleading over a wash of strings on "Not Tonight" and floating sweetly then swinging hard through the slow-burning blues of "My Problem Is You."

 To re-create that authentic, unmatchable Royal sound, Mitchell called in as many of the original musicians as possible, including such stylists as guitarist Mabon "Teenie" Hodges, bassist Leroy Hodges, background vocalists Donna Rhodes, Charlie Chalmers and Sandra Rhodes (see especially "My Problem Is You"), tenor saxophonist Andrew Love and trombonist Jack Hale.