Professional Song Writers They're Not.
Here's a secret kids, Hanna Montana is not real. And she doesn't song write.Please don't fool yourself teenyboppers of the world, Hanna Montana (who is a fictional character on a fictional scripted show) is the calculated creation of middle aged executives, designed to separate teenagers from their money. I mean really, a money making juggernaut like the Walt Disney company would not entrust the money they sunk into developing that show to the songwriting talents of a 15 year old girl (or a one hit wonder like Billy Ray Cyrus).
Her first album lists about 8 producers - that's who writes her songs not her or Billy Ray. Best of Both Worlds (and about 6 other songs) was written by this man, Matthew Gerrard. He also wrote 3 songs for High School Musical. Look at his bio, and you'll notice he's written for Cheetah Girls, Hilary Duff, Nick Carter, Plain White T's, and Eden's Crush, look at the link for the complete list it's a veritable teenyboppers who's who.
Miley/Hanna might have contributed a few words to a song to get songwriting credit, but this guy and a half dozen others are the brains behind the voice. Most pop stars today are the creations of some middle aged, male, (mostly white) executives.
Here's a direct quote by Matthew Gerrard profiled in the link above. "we came up with a style that would work stylistically for her and the show and have a unique sound. I ended up writing six songs for the soundtrack, including ‘Best Of Both Worlds,’ which is the show’s theme song." "WE CAME UP WITH" it's a show people, calculated to sell. And apparently, for this song writer, it does.