LISTEN: Eminem, Hayley Williams, B.o.B. Collabo

Hayley Williams / B.o.B. / Eminem

Hip-hop's oddest couple has been unleashed by B.o.B, the chart-topping Atlanta rapper who brought Hayley Williams and Eminem together for his new song "Airplanes (Part II)."

B.o.B. just posted track to his website and you can listen right now, right here!

"Since the album is leaking...I want this one to come from ME," B.o.B. explained of the song’s sudden leak.

The track, off the April 27 release of the rapper’s debut, B.o.B Presents: The Adventures of Bobby Ray, features a piano-based melody,  Williams' wistful vocals, and Em's angry rhymes: "Marshall you never gone make it / Makes no sense to play the game / It ain’t no way that’ll you win," he raps.

Williams and Em never actually shared the studio, but that didn't stop the pop-punk singer from praising her vocal counterpart: "I only found out about Eminem getting on the track like a month ago. As if the song couldn't get any better. He just slays me, he's such a genius," she said.

"Both versions of the track are incredible, that's all I'll say," Williams added. "I'm so proud to be a part of this!"

Listen to the new track, then tell us what you think in the comment section below.