Race to Erase MS Had An Eclectic Guest List Indeed

What do Avril Lavigne, Joan Collins, Victoria Justice, and the HQ Trivia Dude have in common? Well, other than maybe playing HQ every day -- I don't know Queen Joan's life but I imagine she loves a contest -- the answer would appear to be "an invitation to this party."

[Photos: InstarImages.com, tewart Cook/REX/Shutterstock, Jen Lowery/SilverHub/REX/Shutterstock ]