Long-term Sony artist Leona Lewis has signed an exclusive recording contract with Universal's Island Records.

Lewis released four studio albums at Sony, clocking up sales of over 20 million globally. Her hit singles include the chart-topping Bleeding Love, which became the best-selling single worldwide in 2008.

When her 2012 studio album Glassheart - released on Syco/Sony - was a commercial disappointment in the UK and failed to be granted a full released in the US, her career appeared to have ...