Canada's MuchMusic network hosted two of the biggest pop stars in the world for Sunday night's show in Toronto. And neither Katy Perry nor Justin Bieber disappointed.

For his part, Justin treated his native Canadian audience to back-to-back performances of "All Around the World" and "Boyfriend," showing off his ever-more-Michael Jackson-y moves in those drop-crotch pants he's single-handedly propelling to trend status.

Not to be outdone, Katy transformed before the audience while singing "Wide Awake," starting the song in chrysalis form before spreading her wings and revealing herself to be a giant butterfly. Check out both of the showstopping numbers below.

Katy Perry

Justin Bieber