Your cat may like her shoes because they carry strong, familiar smells. Shoes pick up her scent and traces of places she has been, which can make them fascinating to investigate.
She may also enjoy the shoes' texture, warmth, or shape—especially if she likes sitting on or rubbing against them. So she probably isn't admiring the shoes as fashion; she's responding to their smell and feel.
If she chews or licks them, keep them out of reach, since dirt or shoe materials could be unsafe for her.