Watch Pentatonix Give 'Teenage Mutant Ninja Turtles' Fans the Perfect Theme Song

Brandon Lyon/RCA

Pentatonix photographed by Brandon Lyon.

Anyone else suddenly craving a slice of pizza? Blame Pentatonix.

The a cappella group released a new song, "We Are Ninjas," in anticipation of the Teenage Mutant Ninja Turtles movie release. “The ideas is we’re kind of riffing off the turtles,” said director Melissa Bolton-Klinger in a behind-the-scenes clip. "Dark alleyway scenes, kind of West Side Story meets ninjas.” 

"Long before our days begins/What every hero needs/Is a big 'ol greasy piece," Pentatonix sing alongside shots of the turtles. No word on what Vanilla Ice thinks of the track.