This group was on Britain's Got Talent a few years ago.  They call themselves "The Zimmers."  Their group has two married couples and even an 88-year-old woman.  They look very confused as they start their act by singing "What The World Needs Now Is Love."  Everything seems normal at first, but then the music skips as they really grab the attention of the judges. 

Check out the video to see their surprising act.