Keith Urban is not letting a silly controversy about his recent Mar-a-Lago performance faze him ... 'cause the country star's too busy raising bank for sick children. Here the deal ... KU just headlined a benefit concert at the CME Group Tour Championship in Naples, Florida on Tuesday ... and he helped raise a record $2 million for St. Jude Children’s Research Hospital. It's a big deal for a few reasons ... obviously, the dude has a huge heart -- actively supporting St. Jude for years -- and he