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STORY: Muhammad Ali presented his "Celebrity Fight Night XIX" in Phoenix, Arizona, honoring, among others, Jennifer Lopez. The singer was on hand to accept an award from the organization - a non-profit that supports the Muhammad Ali Parkinson Center. After the honors, Lopez took to the stage to entertain, performing a duet in spanish with Andrea Bocelli, then going solo with some of her biggest hits, including "On the Floor." The event, which included a silent auction, raised more than 7.2 million dollars.