Elvis Presley supposedly loathed the "strawberry blond" wig he had to wear as the hillbilly cousin in this film, in part because it made him look as he had before deciding to dye his hair black in the mid-fifties.
When Selena & Azalea get back from shopping in Knoxville with Josh, they are both wearing bikinis. But it was taboo to show a girl's bellybutton at the time, so Azalea's bottoms are made higher in the front & the bow on Selena's waist sticks up to cover hers. Both bottoms are also made thicker (like a diaper) so as to not have any revealing private parts. This is also the same with all of the Kittyhawk girls' bikinis as well.