© @Copyright HELLO! Hello! Magazine is renowned for changing her appearance and has over the years, And as a teenager, the American Idol star rocked , and the star shared an of herself sporting this look on Instagram over the weekend.Fans were quick to comment on the singer's appearance, with one writing: while another wrote: A third added: The photo – which was liked by stars including and Kate Hudson – was accompanied by the caption: "Alexa, play ' When we were young,' prompting other fans