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