LA Ink Turns Into a Giant Prank War 1.59K Morgan Barry 09/09/10 02:09PM Filed to: la ink la ink Kat Von D Nikki Six TV Video On last nights episode of LA Ink, Kat Von D's friend Rooftop engaged Kat's then boyfriend Nikki Sixx in a prank war. The Motley Crue bassist then quickly taught him a lesson in playing with fire.[There was a video here]