There were actually 2 of the baby blue Ford F150s. The set department had to make sure all the rust spots and film on the windshields were identical on both.
For the purpose of this movie, the band Rascal Flatts rewrote the lyrics of their song "Backwards" to fit the younger audience. The verse "You get your mind back, your nerves back, your first heart attack back" was changed to "You get your mind back, your nerves back, your achy breaky heart back" as a reference to the 90's hit "Achy Breaky Heart", sung by Billy Ray Cyrus who - in this movie - plays Hannah Montana's father Robby.
Everytime Miley takes off her wig, her hair is in a messy knot at the back of her head. If her hair was really like that it would be noticeable through the wig.
When Miley and Travis where taking a bath in the waterfalls, Travis grabs the rope and tumbles to his left. In the next shot, Travis was swinging not in the water.
In Lily's birthday, the cake was near the stage. When Oliver blows it up, Billy Ray is near the shake bar that was far from the stage, but still they got hit with the cake's explosion.
No. Hannah Montana: The Movie is a film adaptation of American teen TV sitcom Hannah Montana, which itself was based on episode 3.31 "Goin' Hollywood" of another teen TV sitcom, That's So Raven. The screenplay for the movie was written by Daniel Berendsen. Both the Hannah Montana movie and the TV sitcom star Miley Cyrus.