It's going to be sweaty and dirty, but oh-so-great-smelling later today when the old and new 'Old Spice' guys go at each other in the bathroom.

That's right: Isaiah Mustafa has accepted his successor Fabio's challenge to a duel. The two hunks, tongues squarely in cheeks, will face off at 12PM ET Tuesday, in the online showdown billed as "Mano a Mano in El Baño."

Fabio issued the challenge yesterday with the aid of two comedy duelling pistols and Mustafa quickly accepted, ridiculing his opponent's tactics: "A real man would have challenged me to a duel with a left-to-right slap across the face."

Watch the hilarious videos after the jump.