Brad Pitt attended Jennifer Aniston's 50th birthday party at the Sunset Tower Hotel in Los Angeles on Saturday night. An insider tells People that the pair "hugged and chatted for a bit," but that Aniston didn't give her ex any special attention. "Basically, every single person who loves Jen attended. This included Brad. The party was a celebration of Jen’s life," the source notes. "Brad, for long, was a very important part of Jen’s life. She debated back and forth with friends if she should invite him." The insider goes on to say that Aniston was "very happy" that Pitt showed up.