VIDEO: Leona Lewis Performs 'White Christmas' on THE X FACTOR UK

Leona Lewis, the biggest solo artist to ever come from THE X FACTOR, appeared on the UK singing competition. The performer sang her newest single as well as the holiday classic, "White Christmas" from her new christmas album "Christmas, With Love" which is available to buy now.

Below, watch clips of the performances as well as an interview with Lewis on The X Factor UK!

Lewis' debut album, Spirit, was released in 2007, and sold over eight million copies worldwide. The album's most successful single, "Bleeding Love", reached number one in over 30 countries around the world, and was the best-selling single worldwide in 2008. She was proclaimed 'Top New Artist' by Billboard magazine in 2008.

Lewis released her second album, Echo, in 2009. Her debut tour, The Labyrinth, took place in 2010. Her third album Glassheart was released 12 October 2012. It was preceded by the single "Collide", which became her seventh top-five hit in the UK. With the release of Hurt: The EP and "Trouble", Lewis has had nine top-ten hits in the UK.

Nominated for seven Brit Awards and three Grammy Awards, Lewis has sold 28 million records worldwide. As of 2013, Lewis is the best selling The X Factor act in the United Kingdom, as well as being the UK-born female soloist with most weeks at number one in the UK.