Originally appeared on E! Online It's Jack Blues Bieber's world, we're just living in it. Justin ...

And just like that, you have an 8-month-old baby on your hands. This month, your little bundle of joy will be reaching all sorts of exciting baby development milestones, from crawling to talking ...

Justin Bieber and Hailey Bieber posted new photos of their 8-month-old son Jack Blues Bieber on Easter Sunday.

This can happen as early as 9 months and as late as 18 months ... but so too is there a tinge of sadness: Your baby is moving on, farther and farther from you, less dependent on you, becoming ...