But would she wear it on the red carpet? The Saturdays singer Una Healy cosies up in her 'Onesie'

By DAILY MAIL REPORTER Snuggled up: Una Healy shows off her new Onesie as she cuddles up to her dogs Jackson and Bono on Christmas Day Adult babygros such as 'Onesies' have become a surprise hit over the past year, with buyers forgoing style in favour of comfort.After Rihanna was spotted wearing one earlier this year, The Saturdays singer Una Healy is the latest celebrity to sport the question...