Ivy Snitzer was a 20-year-old drama student when she stepped in as Gwyneth Paltrow’s body double for the “fat suit” scenes in 2001’s Shallow Hal. The film was a hit, but Snitzer has said she watched it exactly once — at the premiere — and never again. Ivy Snitzer on the red carpet at the Los Angeles premiere of Shallow Hal, November 1, 2001. Photo by Vince Bucci / Getty Images. In a 2023 interview, she described how the role made “the worst part…