"Happy Birthday to You" is sung everywhere, but because it's copyrighted, it's rarely heard on TV or in movies. A filmmaker has filed a lawsuit seeking to make the song part of the public domain.

No matter how old you are, having a happy birthday is one of life's great pleasures, says birthday enthusiast Tamar Hurwitz-Fleming. You just need to figure out what that means for you.

A new Happy Birthday song that turns the traditional tune into an R&B and hop-hop event has taken the internet by storm.