How many movies have Henry Winterstern and Justin Guarini collaborated on?

They have worked on 1 movie together! Their first movie together was American Idol: The Best of Seasons 1-4 (2005) and was their highest rated movie together. They have not worked together since American Idol: The Best of Seasons 1-4 (2005).

Crew
Executive Producer
Role
Self - Contestant (archive footage)