They make your heart go bang bang boom.
The Moffatts
Four cute brothers (a set of triplets and a spare) singing catchy, danceable pop songs about love they were far too young to actually understand? You might describe The Moffatts as the Canadian answer to Hanson, and you wouldn't be entirely wrong.
Capitol/EMI
Choice song: "Bang Bang Boom"
Some may argue that "Miss You Like Crazy" or "Girl Of My Dreams" or even "I'll Be There For You" are better songs, but give "Bang Bang Boom" a listen and allow yourself to admit that this song is still catchy as hell. Of course, part of chorus sounds a little similar to Smash Mouth's "All Star," which may be why it's so listenable.
Skye Sweetnam
For people who thought 2004 Avril Lavigne was too mature, Skye Sweetnam filled the niche of pop-punk princesses who were too young to drive.
Capitol
Choice song: "Billy S."
She cares so little about school that she refers to William Shakespeare as "Billy S."! That's so rebellious. Just ignore the slightly creepy lyrics of "Daddy, daddy, no, I don't want to go to school."