I had permed growing out hair (lightened by sun) - hairdresser cut it and I looked awful in the wind - I was a bit anxious etc and for some reason when I got home I chopped half off..... 
My mum marched me to a super expensive hair salon (Jigsaw in Streatham) where they took off my baseball cap shook out one side of blonde curls and the hairdresser wailed "oh what lovely hair!" - I then got a blonde highlighted layered cut that several friends were amazed I looked good with but I piled tons of coloured eyeshadow on everyday so people wouldn't mistake me for a teen boy.
I was 17. those were the days!