2012-04-07:    Us Top 40 Single Charts (07.04.2012)
    2012-04-03:    The Official Uk Top 40 Singles Chart (01.04.2012)
    2012-03-29:    Uk Top40 Single Charts (25.03.2012)
    2012-03-19:    The Official Uk Top 40 Singles Chart (18.03.2012)
    2012-03-18:    Us Top40 Single Charts (17.03.2012)
    2012-03-14:    The Official Uk Top 40 Singles Chart (12.03.2012)
    2012-03-11:    Us Top40 Single Charts (10.03.2012)
    2012-03-06:    The Official Uk Top 40 Singles Chart (04.03.2012)
    2012-02-28:    The Official Uk Top 40 Singles Chart (26-02-2012)
    2012-02-24:    Us Top40 Single Charts (25.02.2012)
    2012-02-20:    The Official Uk Top 40 Singles Chart (19-02-2012)