Rebecca went into labour last week and concerned fans when she wrote that she wasn’t feeling so good (though we can’t imagine the process of giving birth to an actual human baby feels very, well, pleasant).
Luckily, the mum-of-two welcomed her third child into the world, and both mother and baby are happy and healthy.
Rebecca, 28, tweeted: “I don’t want to sleep I just want to look at her ... thank you for all the love and support will update you all tomorrow my angel is here xx.
She then added: “She is so perfect. My arabella is like a beautiful little doll xxx (sic).
The star then added: "Can't put her down she is ruined already such a happy mum xxx."
Baby Arabella is Rebecca’s first child with her current boyfriend who she has been with for over a year, though he wishes to stay out of
the spotlight.
The singer is also mum to daughter Lillie May, 9, and Karl, 7, from a previous relationship.
Congratulations, Rebecca!