They all make sense except for number 5, but they need to be reworded a bit.
1) The deployment separated them from each other.
2) Nowadays, you have to be beautiful; preferably, with a good voice too.
3) Sing with me (this sounds better than "follow me")
4) From this point of the song on, a soprano voice is required.
And I don't understand what you're trying to say in number 5. I hope that helped! :)