Brit singer-songwriter and children's author Tom Fletcher (of McFly) took a photo every day throughout his wife Giovanna's pregnancy. He then wrote a lovely song called "Something New" to go with it. The end result is a touching 3 minute time-lapse video they call 'From Bump to Buzz." Buzz is the name of the wee boy Giovanna gave birth to.
It's lovely, and not surprising it's gone viral.