GARTH BROOKS gave two performances at yesterday's inauguration ceremony.The first was the official one when he sang a very moving version of "Amazing Grace". Even though I've heard that song a million times, I got all misty-eyed.Toward the end he asked everyone there, and those watching on TV, to sing the last verse with him, adding, quote, "As one.United. The "second performance" everyone is talking about was the series of handshakes and hugs after he left the stage.He shook hands with President Biden, Vice President Kamala Harris, and former Vice President Mike Pence. But he wasn't done.He stopped to hug Barack and Michelle Obama . . . Bill and Hillary Clinton . . . and George W. and Laura Bush.