Selena Gomez has a new baby sister.

The 20-year-old singer's mother Mandy Cornett reportedly gave birth to a baby girl in Northridge, Los Angeles, on Thursday (13.06.13).

A number of friends and family members were spotted visiting the hospital where Mandy - who divorced Selena's father, Ricardo Gomez, when the 'Love You Like A Love Song' singer was five-years-old and married Brian Teefey in 2006 - is staying and one well wisher was carrying a monkey and a balloon with the words ''New Little Princess.''

The 'Come and Get It' hitmaker revealed her mother was expecting her second child last month on Twitter, where she shared a picture of her with her pregnant mother.

Mandy and Brian were devastated when she tragically miscarried during her last pregnancy in December 2011 after Selena announced: ''Momma and Brian are finally letting me share the news...My mommy's carrying my baby brother or sister :) I'm the happiest girl in the world!''

Selena cancelled her scheduled concerts in Chicago and Seattle to fly home to her grieving mother at the time.

The 'Spring Breakers' star was last spotted with Mandy in Los Angeles last week when they enjoyed a trip to the cinema together.

The brunette beauty is set to kick off her world tour 'Stars Dance' in October in Washington D.C.