Also in the running for the title - which was determined by public vote - were TV presenter Davina McCall, actress Amanda Holden and three members of girl group The Saturdays - Frankie Sandford, Rochelle Humes and Una Foden.
The annual award urges the public to vote for a celebrity mum who they reckon is 'doing a stellar job with her little ones, whilst forging a successful career in the public eye'. Last year the title went to former Spice Girl Emma Bunton, who is mum to boys Tate and Beau.
Dressed in a turquoise jumpsuit and purple velvet heels, former Liberty X singer Michelle posed with the award in a photo posted to her Twitter feed earlier today, thanking the fans who voted for her.
- michelle heaton (@wonderwomanshel) March 19, 2014
Michelle gave birth to baby Aaron Jay - her second child with with husband Hugh Hanley - on February 28.
The couple were married in a private ceremony in the Bahamas in the summer of 2010, and already had a daughter together, two-year-old Faith. The family posed on the cover of OK! magazine earlier this month for the first official photos of 'AJ'.