LOS ANGELES - Not surprisingly, James Cameron's "Avatar: The Way of Water" clung to first place on North American movie screens this weekend, pulling in an estimated $45 million, but an unexpectedly popular horror movie placed a strong second. The "Avatar" sequel has now led the box office for four weeks, industry watcher Exhibitor Relations reported Sunday. The 20th Century sci-fi film has amassed domestic earnings of $516.8 million and $1.19 billion internationally, making it the seventh biggest movie in history. But scary doll thriller "M3GAN" from Universal and Blumhouse -- the title stands for Model 3 Generative Android -- was also impressive,...Keep on reading: ‘Avatar’ on top but ‘M3GAN’ scares up strong sales in N.America