 The producers were not allowed to use any Elvis recordings or songs  during the episode "All Shook Up" because the Presley estate was  upset over the episode which they felt was disrespectful.  Nonetheless, two songs identified with Elvis were still included:  Hammer mumbles nonsense lyrics to the melody of "Love Me Tender"  which was actually an old public domain folk song called "Aura Lee",  and sings the ending of "Battle Hymn of the Republic" which was also  public domain.