Sel's mom, Mandy Cornett, and her husband Brian Teegey welcomed a daughter on Thursday.
"@selenagomez IS A BIG SISTER!!!!!! Everyone congratulate her and her family!!!!!! #CONGRATSSELENA!!!!" her friend Demi Lovato tweeted.
She continued, "#CONGRATSSELENAMANDYANDBRIAN !!!!!!"
This is Selena's first sibling! How cute! We can't wait to see a pic and find out what her name is. We bet she'll be just as beautiful as her sis!
Congratulate Sel and her family in the comments below!
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Gallery | Selena Gomez on The Red Carpet