Mother's Day isn't even the mid-point of the year, but it has already been quite a year for celebrity moms! Sure, a royal babe and reality TV bundle are set to arrive in July, but we've already welcomed several star-studded, awww-worthy babies in the first four months of the year. Big names like Kristen Bell, Rosie O'Donnell, and Shakira have all introduced new bundles of joy over the past few months, and that's just to name a few. Take a peak at 2013's new celebrity mamas — we wish them congrats . . . and plenty of naps!