London (DS)Leona Lewis’s latest single has failed to reach the Top 200. The singer released ‘Lovebird’ as the second cut from her latest album Glassheart, but the track didn’t register on the UK’s official singles chart. The 200th track on the chart during that week sold 600 copies, meaning Lewis’s latest cut sold less than that, making it her lowest-selling single ever.  “This is a bitter pill to swallow for Leona and there is no sugar-coating it,” a source told The Mirror.