Baby girl, don't sing it if it hurts. Take it from me. I learned that the hard way. If your singing something and it hurts, it means that you have to warm-up more, or just not sing it. It also might be, that the higher version of the song is not in your range.
Listen to this and tell me if it's the key your singing it in. If it is...Well than you should probably be able to sing that with no problem. But, I don't have your voice. I can sing the key that she's singing it in, perfectly.
(Send me PM with how old you are so I can determine your range.)
Listen To This Girl Singing It
Shows I wanna see:
Shrek,
Billy Elliot (again),
Hair,
In The Heights (again)