British pop star Alesha Dixon has become a first-time mum after giving birth to a baby daughter last week (ends04Oct13). The singer, who also acts as a judge on reality TV show Britain's Got Talent, welcomed baby Azura Sienna with her boyfriend, dancer Azuka Onony. Dixon announced the happy news on her Twitter.com page on Monday (07Oct13) while celebrating her own birthday, writing, "Thank you for all of your lovely birthday messages! I've had the best present in the world... My baby girl Azura Sienna was born last week!!! I'm elated and over the moon."