The 24-year-old actress told the Daily Express that she made style mistakes as she tried to follow in the footsteps of fellow cast members on the Channel 4 soap.
Atkinson played Lisa Hunter on the teen drama from 2001 to 2006. She has since worked as a model and appeared on reality TV.
Asked to categorise herself as a fashion victim or trend setter, Atkinson replied: "I was a victim during my years on Hollyoaks because I was trying to fit in with the young female cast.
"These days I dress to suit my body shape as opposed to what a top model is wearing in a magazine because I know it won't look the same on me."
Quizzed about whether she has expensive tastes, she commented: "I have more designer shoes than clothes and own a few pairs of Christian Louboutin and Gucci shoes. I get more wear out of them than a dress so I don't mind spending a bit more."
Atkinson recently vowed to put modelling on hold and concentrate on her acting career.