Tess Holliday — formerly Tess Munster — was told for most of her life that she was too overweight and short to be a model. Today, she's a jet-setting rising star who's been featured in Vogue Italia, modeled for dozens of fashion designers, and this week became the largest plus-size model signed to a mainstream agency. "I feel like it's breaking ground. This is a milestone," said Holliday, 29, from her home in Los Angeles. "I never could have imagined that I could be here."