It looks like Selena Gomez is going to be a big sister. The 20-year-old "Come & Get It" singer subtlety revealed the news that her mom is pregnant on Mother's Day with a photo she shared on Twitter.

"Hope all the amazing moms had a great day! I have the best momma in the world :)) I love you so much!" She tweeted. Along with the Mother's Day message, she shared a photo in which her hand is laid over her mother's belly.

Gomez, who is an only child, was born when her mother, Mandy, was only 16. According to Just Jared she married Selena's stepfather, Brian Teefey, when Selena was five.

Gomez had prepared for being a big sister once before in 2011. Selena's mother, however, tragically suffered a miscarriage. After her family took time to heal, Selena revealed her mother was pregnant with a baby girl, and she was going to be named Scarlett.

Around Christmastime in 2011, Selena tweeted a belated holiday message to her fans. The Daily Mail reported at the time, she signed the note, "'Love, Me, Momma, Brian and our guardian angel Scarlett."

The "Love You Like a Love Song" singer may have been more cautious when it came to her mom's pregnancy this time. According to Disney Dreaming, pregnancy speculation began swirling last month when Mandy attended the Radio Disney Music Awards with her daughter. She looked to be anywhere from 3-6 months pregnant.

photo courtesy of Selena Gomez