LOS ANGELES (AFP) - Slasher flick “Texas Chainsaw 3D” stole the top slot at the North American box office this weekend, driving “The Hobbit” from its three-week perch in first place, estimates indicated Sunday. The latest offering in the horror franchise, first launched in 1974 but now in 21st century 3D gore, took in $23 million in its debut weekend, the first of the new year, according to box office tracker Exhibitor Relations. Not far behind in second place was Quentin Tarantino’s brutal Western “Django Unchained,” which earned $20 million it its second week.