76ers partner Michael Rubin's dishing cold hard facts about how he came up with the ingenious "All in Challenge" -- which already has Drake, Tom Brady, Meek Mill and so many more on board.
Michael joined us on "TMZ Live" and talked about why he felt he needed to step up to help the millions suddenly in need during the coronavirus pandemic. When it came to figuring out HOW he could help, he says he remembered the phenomenon of the ALS Ice Bucket Challenge.
That 2014 movement ended up raising a whopping $115 million during an 8-week period .