Peanut Butter Jelly Galantis
After beating JLS on the 2008 series of The X Factor, Alexandra's Hallelujah, reaches Christmas No. 1.
Alexandra's version of 'Hallelujah', which sold more than 1 million copies, became the fastest selling single by a female in the UK.
Take a look at the video for 'Hallelujah' and let us know what you think below...