John Travolta is adding a new four-legged friend to his family. The actor took to Instagram Monday to reveal that his son, Ben, 11, adopted the adorable dog that Jamie Lee Curtis held onstage during the Oscars' «In Memoriam» segment on Sunday.Curtis was celebrating the life of the late Betty White, when she announced that the dog, named Mac-N-Cheese, was available for adoption in honor of White, who was a known animal lover.«She was not only a Golden Girl, she was a legend who brightened every room she walked in and brought a smile to the faces of all who watched her on the screen,» Curtis said.