Cotton has also presented many charity telethons for both Comic Relief and Children in Need on BBC One and BBC Two.
In 2006, Cotton presented the second series of Love Island with Patrick Kielty on ITV, taking over from Kelly Brook.
In 2007, she took over from Ben Shephard as the host of The X Factor spin-off programme, The Xtra Factor on ITV2.
Cotton was born in Northwood, London to Mick and Lyn Cotton; she has a younger brother, Jamie Cotton.
Her father was a signwriter for events such as Live Aid and her mother worked in alternative therapy.
Since 2008, Cotton has appeared as a team captain on the ITV2 comedy panel show Celebrity Juice alongside host Keith Lemon and fellow team captain Holly Willoughby.
Away from presenting, Cotton has her own fashion and homeware range with online retailer uk and supports several charities in her spare time.
She later co-presented on CBBC's Sunday morning show, Smile and on The Saturday Show.
She has also made appearances in the CBBC show Only in America, alongside her good friend and fellow presenter Reggie Yates.
The accounts of her ancestors' lives revealed some mixed fortunes, but Cotton was pleased to have discovered family history tales that she would be able to pass on to her own children.
The programme revealed that one of her paternal great-grandfathers, Evan Meredith, had been a Welsh coalminer who had endured prison as a conscientious objector to military service in WW1 and in later life became a respected pharmacist.
The show saw them try to find dates for lonely singletons.