Selena Gomez shared some exciting family news on Mother’s Day – she’s going to be a big sister!

The 20-year-old pop star tweeted a photo of her mom Mandy Teefey with a growing baby bump.

She added, “Hope all the amazing moms had a great day! I have the best momma in the world :)) I love you so much!”

It will be the first child for Teefey and her husband Brian, who got married in 2006.

As for Gomez, she’s got a busy year ahead. In addition to her big sister-to-be responsibilities, she’s releasing a new album (Stars Dance) and has an upcoming world tour.

Oh, and she’s officially single. During an interview with Boston Kiss 108 radio station, the Spring Breakers actress (and Justin Bieber ex) confirmed that she is flying solo:

The DJ asked Gomez, “So sometimes you may see a boy walking down the street and he says, ‘Let’s grab an ice-cream.’ You’re available?”

She responded, “Yep!” before adding, “By the way, that would be awesome if someone asked if I wanted ice cream because that would be cool.”

So if you’re a Selena fan… bring ice cream.