05.13.134:09 PM ET

Selena Gomez to Be Big Sis

Star tweeted photo of pregnant mom.

Selena Gomez is expecting something new to love like a love song, baby—a baby sibling, that is. On Mother’s Day, the singer tweeted a photo of her holding her mom’s bulging belly bump with the message “Hope all the amazing moms had a great day! I have the best momma in the world :)) I love you so much!” Gomez, 20, credits her mother, Mandy Teefey, 37, for raising her as a single parent after divorcing Gomez’s father. “It’s because of [my mom] that I can do things on my own,” she said.