paul mccartney

Paul McCartney is reportedly engaged to girlfriend Nancy Shevell, sources tell PEOPLE magazine. "Nancy and Paul are getting married - ring and all. Very exciting," the source said. The couple, who appeared together Monday at the 2011 MET Costume Gala in New York, began dating in the Hamptons during the summer of 2007.

In honor of Valentine's week, Billboard has compiled a list of the biggest duets of all time -- and coming in at #1 is "Endless Love," by Lionel Richie and Diana Ross. The magazine came up with the list by ranking each song on a point system based on its performance on the Billboard Hot 100 chart: the more weeks a song spent at #1, the more points it would get.