Matt LeBlanc who popularly played the role of Joey Tribbiani in Friends celebrates his birthday on July 25. For anyone who has followed the series or not, the catchphrase "How you doin?" is familiar. As the actor turns 53, we can't think of a better way to celebrate his birthday than by rewatching Friends enjoying all his fun antics on the show. We can't imagine another actor essaying the role of Joey except for Matt and hence here's celebrating his birthday with his best quote from the show.