What happens when you put two of music's biggest stars on stage at Madison Square Garden in New York City?
You get an absolutely EPIC duet!
Which is exactly what happened when Jon Bon Jovi joined Billy Joel to perform the Piano Man's 1980 hit 'It's Still Rock and Roll to Me'.
The pair of Rock and Roll Hall of Famers traded lines on the song, before breaking into the 70-year-old's 'Big Shot.'
Just imagine being in the audience!