How to look younger???

I was shopping in Juniors department I'm 25 kid says mom is this side for old people I felt so bad. His mom was 16-18 I felt really old. The department store has Juniors which is one side like teens, other side more elegant clothing like for work also summer dresses the other side is really for older women. They don't have Misses.

Is 25 old what is happening ugh where do you guys shop what is in I need a makeover help me