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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. CME Group/Ryan McLemore

It's a big deal for a few reasons ... obviously, the dude has a huge heart -- actively supporting St. Jude for years -- and he also just performed and presented at last night's CMAs. But there was a snag over a song he played at a private gig. Getty

TMZ broke the news ... Keith performing a LGBTQ+ anthem at Mar-a-Lago with Trump in the room wasn't him trying to send a politica

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