Taylor Swift and Selena Gomez- "Who Says" Live

Selena Gomez announces mother's pregnancy

Selena Gomez

Selena Gomez has revealed that she will soon have a younger half-sibling.

The Wizards Of Waverly Place star revealed on Twitter that her mother Mandy and her stepfather Brian Teefey are expecting a baby together.

"Momma and Brian are finally letting me share the news," she wrote. "My mommys carrying my baby brother or sister :) I'm the happiest girl in the world! (sic)"

The 19-year-old's post was accompanied by a black and white photo of Teefey caressing her mother's sizeable baby bump.

Gomez grew up as an only child after her parents divorced when she was just five years old.

Gomez has pledged to stand by her boyfriend Justin Bieber amid allegations that he fathered a child with fanMariah Yeater.

The 'Never Say Never' singer revealed this week that he has taken a paternity test.

Watch Selena Gomez & The Scene in the video for 'Hit The Lights' below:

Popout
Yep, one more guest performer. Although this may be my least favorite. Check it out!