Her sound hasn't evolved much, but obviously that's because she still feels like 17!
Avril Lavigne performed her new single Seventeen for a live crowd at the Viper Room last night and we were reminded WHY we loved her SO MUCH way back when.
The Sk8r gurl was the perfect mixture of sweet and spicy to get her fans riled up about her precious, not-so-innocent teenage years.
Ch-ch-check out the video (above) and see the punk rock princess rock it out!!!!