Tim McGraw and Faith Hill made their presence known in New York this past weekend with a charity performance and a two-night stand at Madison Square Garden. The couple appeared Thursday (June 22) at Tavern on the Green during the Four Seasons of Hope gala that raised almost $1 million to be shared by charities led by several celebrities, including Dan Marino, Earvin "Magic" Johnson, Joe Torre, Boomer Esiason, Arnold Palmer, Rudy Giuliani and Jon Bon Jovi. A portion of the proceeds will go to the couple's Neighbor's Keeper Foundation to assist individuals affected by natural disasters or social status. At Friday's concert at the Garden, Tony Bennett made a surprise appearance and joined McGraw in singing Hank Williams' "Cold, Cold Heart," a pop hit for Bennett in 1951. Their version of the song will appear on Bennett's next album, Duets -- An American Classic, to be released in September.