The Tonight Show host sang the song to remind everyone about the oil spill that happened April 22, 2010. The Gladiator actor then chimed in to help the host bring awareness about the lingering side effects since the event occurred, like tar balls.
"Gosh darn it, those tar balls are still washing up in the shores...despite the fact that five years ago I wrote a protest song railing against that very thing," said Fallon. "Apparently BP still didn't get the message. Maybe it's the song's fault...Maybe I just let everyone down."