17 Celebs You Totally Forgot Were On 'Lizzie McGuire'

How many of these celebs do you remember seeing on the Disney Channel show?

Justin Bieber Declared His Love For 'Hot' Luke Bryan

Justin Bieber, Brittany Snow, Tom Arnold, Arnold Schwarzeneggar, Erin Andrews, Steven Tyler, Rick Springfield, Kristen Bell, and James Corden all teamed up for this CMT Awards cameo video.