The first Sylvie Vartan song in my playlist is her version of Little Eva's The Locomotion. At that time, her Le Locomotion was the only Ye-ye song I listen to apart from Francoise Hardy's emotional tracks. Since then, Sylvie Vartan became my Jeanspiration. I guess the very reason why girls prefer this kind of combination is due to the fact that jeans is a versatile item that can be paired with almost all the tops available.
My only tip to all the girls wanting to have her " perfect jeans" is to choose quality over quantity. I'd rather buy a single jean worth xxx that'll last for 2 years than buy xx worth that'll only last for 3 months.