R&B star-turned-actor Ne-YO fell out with his Battle: Los Angeles co-star Aaron Eckhart onset because the singer couldn't understand why the actor stayed in character after the cameras stopped rolling.
The So Sick hitmaker appears in the alien invasion movie as a soldier, opposite The Dark Knight star as a marine commander, and the pair nearly came to blows as Eckhart insisted on continuing his onscreen persona even when they weren't working.
And Ne-Yo admits he was baffled by the actor's behaviour.
He tells Et Online, "I didn't understand the concept of staying in character the whole time. We almost got in a little tussle just behind me not understanding that he's still in character... (Eckhart) plays a tough guy in the film, so it was lunch and I go, 'Hey, Aaron.' And he goes, 'Leave me alone.'"
But Ne-Yo insists working with Eckhart was an eye-opening experience, adding, "He's a fantastic actor. I learned a lot just by watching him."