Il Volo - 'O Sole Mio American Idol live performance 

A group of Italian teenagers Piero Barone (17), Ignazio Boschetto (16) and Gianluca Ginoble (16) aka Il Volo's performance of 'O Sole Mio during the American Idol Top 3 results show.
"O Sole Mio" was written in 1898. In 1950, Tony Martin had a #2 hit with "There's No Tomorrow" (same melody, different lyrics). In 1960, Elvis Presley had a #1 hit with "It's Now Or Never" (same melody again, but different lyrics).