So, Jessie J and Tom Jones show up on the Grammys [1] stage together . . . and this isn't a joke. This year, current stars were paired with some of the most famous acts of the past. Jessie J and Jones sang the Righteous Brothers' 1965 classic "You've Lost That Lovin' Feelin,'" and it was a classy old-school turn for the Grammys. Admittedly, they're a strange pair, but this song is gorgeous, and we'll take any excuse to hear it from some beautiful voices. Take a look below!