Talk about the wonder years! Avril Lavigne surprised everyone with her new video for "Rock N Roll" -- not because of the song's girl power themes or catchy hook, but because it features a kiss between Lavigne and actress Danica McKellar. That's right -- Winnie Cooper.

Lavigne Tank Girl

Just a head's up: the video/song is NSFW, so unless you've got a really cool teacher or boss, you may want to listen to this one with your headphones on!