What is happening?? Is this a mental disorder?

Recently, I found out that one of my favorite singers had lost her memory. Record says this had happened three other times but she only lost her memory of a few days prior, but this time, she lost three years worth of memory, which is when her music career began. Her boyfriend got on camera that she kept saying, "I wanna make a rainbow." When he asked her how old she was she said "Four fingers." even though she's about nineteen. During the video, she began to shake, though her eyes did roll and it seemed as if she were having a minor seizure. I worried that these could lead to Grand Mal Seizures and that she could lose her life because her boyfriend is tight on money and can't afford a medical bill, and he family is not aware of this, as they live in Canada instead of the United States, where she is currently with her boyfriend. He said that when she first woke up she didn't know who he was and thought he kidnapped her and attempted to injure him and that she also didn't realize who she was. Are these early signs of possibly a tumor or cancer in the part of the brain that stores memory? I don't know if this is fake or not, but if it is, it's a fake and sick prank. So, is any of this a symptom of brain malfunction or a strange type of disease?