By Jennifer Davis
Updated May 14, 2013 @ 11:29 am
Selena Gomez
Credit: Courtesy Twitter/Selena Gomez

Selena Gomez is going to be a big sister! Our June cover girl announced the exciting news on Twitter yesterday after spending the Mother’s Day weekend with her mom, Mandy Teefey. “Hope all the amazing moms had a great day! I have the best momma in the world. I love you so much!” she wrote in her Tweet, which was accompanied by a photo of her lovingly embracing her mom’s burgeoning baby bump (shown inset). Congratulations to the entire family!

Plus, click to see Selena’s InStyle cover and read five things she told us in her cover story!