Number one with Hallelujah in 2008 and Bad Boys (feat. Flo-Rida) in 2009, Alexandra Burke racks up her third number-one single, Start Without You. The track, which also features a rap from US newcomer Laza Morgan, is the 18th number one spawned by The X Factor. Burke is now one of three X Factor acts to score a hat-trick of number ones, alongside Leona Lewis and JLS. In addition to her number ones, Burke reached number eight with Broken Heels ...