EW Exclusive: National Hangover Day video with Justin Bartha

New Year’s Day has unofficially been Hangover Day since, well, champagne was invented. But now Warner Bros. is celebrating the DVD launch of The Hangover with National Hangover Day slated for Jan. 1. One of the film’s stars, Justin Bartha, gets you in the mood with this PSA, launching exclusively at EW. Fans are being encouraged to watch the movie to nurse their hangovers, and visit a special website to share Hangover Day plans.

So, will you watch The Hangover on New Year’s Day? What are your other hangover plans?