Julio Iglesias was not only the most popular Spanish singing star of the '70s and '80s, but an international sensation as well. Though casual fans may know him best for his smash duet with Willie Nelson, "To All The Girls I've Loved Before," he's had a long and varied career. Besides the romantic pop crooning for which he's most famous, Iglesias has also recorded albums of Brazilian music and tango. In addition to his work with Nelson, Iglesias has collaborated with everyone from Frank Sinatra to Stevie Wonder. Continuing the legacy, his sons Enrique and Julio, Jr. both became Latin pop stars in their own right, making women swoon just the way their father always did.