The following celebrities were greeted as they walked into the International Hotel in the film: Juliet Prowse, Charo, Xavier Cugat, Rona Barrett, Norm Crosby, & Dale Robertson. Seen at the showroom tables were Sammy Davis, Jr. & Cary Grant.
Principal photography began the 2nd week of July 1970, during rehearsals at MGM. Shows at the International Hotel were filmed in August. Photography was completed on September 9th with the concert in Phoenix, Az at the Veteran's Memorial Coliseum.
Backstage, before the concert, Elvis is nervous about remember the words of his new song "I Just Can't Help Believin'". He starts singing the song. One of his band mates, tries to reassure him telling him that's the first verse. Elvis responds, positively, if he can remember the first lines, he'd be fine and remember the rest of the song. However, the lines Elvis was singing to remember the song were actually the third and fourth lines of the first verse - not the lines at the beginning of the song.