“American Horror Story” fans are getting another iconic musical number from Jessica Lange in Season 13. Co-creator Ryan Murphy talked about how he got Lange, 77, to reprise all four of her “American Horror Story” characters in the upcoming season and revealed that she agreed on one condition — that she gets to sing. “I just thought the number 13 was infused with so much stuff in the horror genre, and I wanted to do a greatest hits season,” he told Vogue in an article published Wednesday. “I didn’t know what it was, but I knew that I could only do it with Jessica. So we had dinner … and I pitched her, and she said, ‘Great. I’m in as long as…
