Selena Gomez Is A Big Sister !

It looks like Selena Gomez's family just got a little bit bigger!

The Come And Get It singer announced on Mother's Day that her mom Mandy Cornett was expecting her first child with her husband Brian Teefey, and last night she gave birth to a beautiful baby girl!!

There's no word yet on what they've named the little princess, but hopefully Demi will stay on baby patrol and tweet an update for us soon!

We're sooo happy for Selena and her family and we know she's going to make an EXCELLENT big sister!

Congrats to her family !