Teen puts too much pressure on herself to be perfect and it is causing her stress. What can I do to help her?

My 13 year old daughter has always been a perfectionist. It was so bad when she was younger that she wouldn't even try something if there was a risk of failure. We worked hard to get her out of that mindset and it seemed to work. She tried new things and stopped putting so much pressure on herself.It seems to have picked up again recently. She is always trying to be perfect. This attitude exist in pretty much all areas. School, sports, orchestra, friendships, and at home. She is on the accelerated track at a very academic based middle school and is doing fine in her classes, but she is constantly checking out her grades and is staying up late to study and finish homework. She gets upset and annoyed if she doesn't have the highest grade in her class. She does sports and is in her school orchestra. She gets frustrated if she makes a mistake in either one. She will come home and practice until she gets it exactly right multiple times in a row.It's stressing her out a lot. She has to be up at 5:30 in the morning to get ready for school, but sometimes isn't asleep until close to 12am. She isn't getting enough sleep and has pretty busy days, so she is very crabby by the time we get home. She had an attitude last night and talked back to her mom. She immediately apologize (again, she wants to be perfect), but I can tell that this is affecting her. We are close and I have talked to her about this. She agrees that she can try too hard sometimes, but doesn't know how to stop it. Any advice? via /r/Parenting http://ift.tt/2xfQket