Live Nation announced Monday that U2's ongoing "360" tour has officially become the top grossing tour of all time, as Sunday night's show in Sao Paulo, Brazil brought the tour's grand total in ticket sales past the Rolling Stones' "Bigger Bang" tour, which grossed $554 million from 2005 to 2007.  With 26 shows left on the "360" trek, U2 is expected to easily surpass $700 million in sales by the time the tour winds down July 30th in Canada.