The photo taken backstage on her world tour shows her singing in front of a mirror, but it's the position of her hand that's got everyone talking.
Adele is known to be secretive; she had a secret wedding with her man of many years, Simon Konecki, and only hinted at it while accepting her Grammy Award, so her fans probably are not expecting her to come outright and state if she's pregnant.
Adele and Konecki are already parents to a four-year-old son, Angelo.
