How do I ask my mom to let me wear makeup?

Find a time when you are both relaxed (with no distractions) and no on else around. I'm sure she'll be honored that you want her permission and advice so I wouldn't worry too much. Parents love their children being honest and up front with them. Don't forget she will have gone through the same thing at your age!

If you can't muster up the courage, then I recommend you write a note and leave it on her pillow or somewhere she will find it. Then she will probably write you one back so you don't get embarrassed.

Good luck!