It was just three weeks ago that the singer had revealed the great news that her mother and stepfather Brian Teefy were expecting their first baby, Radar Online reported.
"I'm the happiest girl in the world!!" she had tweeted. According to E! Selena's mom has suffered a miscarriage. It would have been the first sibling for Justin Bieber's girlfriend who has often spoken about being an only child.
The 19-year-old has cancelled two holiday concerts, with her representative citing a "family emergency."