When did this happen?

Belle was in outfit number three for the day by 8 am this morning.  Let's just say she kept me busy while I was trying to get ready for work.  I quickly put a new outfit on her before heading out the door..  When I came home tonight, I realized not only were the pants way too small, but the sleeves on her onesie are too short.  When did this happen?!?!  Is she growing up quickly already?  I swear all of this fit just last week!  New item on the weekend to-do list, get Belle some bigger clothes!

Look at that double chin!