Barry Manilow has sold tens of millions of records and turned songs like Mandy and Copacabana into part of the American songbook. Now he is bringing his show to KeyBank Center, and this one is billed as his last Buffalo concert. If you have a parent, an aunt, or a grandmother who knows every word, this is the night to take them. Expect the hits, the showmanship, and a room full of people who grew up on these songs. Some nights are about the music. This one is about saying thank you.