At the age of 15, while she was a US size 16 (UK 18/20) and 5 feet 3 inches tall, Holliday auditioned at a casting call for plus models in
Atlanta,
Georgia, where she was told she would be lucky to do print advertisements or catalogue work because she was too short and big. Subsequently, Holliday relocated to
Seattle where she stayed for two years and worked as a make-up artist, hair stylist and creative director at fashion shows. She then moved back to Mississippi and gave birth to her son (at the age of 20). Then, following
Hurricane Katrina, she returned to Seattle in October 2009) then she moved to
Los Angeles in 2010. In June 2011, She has shot a campaign for
Benefit Cosmetics, worked with
David LaChapelle, featured in
Vogue Italia and appeared in
Nylon magazine. In May 2014, a video was uploaded on
Vimeo called
#everyBODYisflawless, which featured Holliday and fellow plus-size fashion bloggers and models Gabi Gregg and
Nadia Aboulhosn lip-synching and dancing to
Beyoncé's 2013 song "
Flawless". In September of that year, she was interviewed by
Jacob Soboroff and
Meghan McCain on
TakePart Live. In January 2015, London-based modeling agency Milk Model Management announced that they had signed Holliday to their plus-size division, Curves. They declared that Holliday had become the largest plus-size model of her size and height to be signed to a mainstream
modeling agency In May, she had her first agency shoot. In March 2014, Holliday became the first model over size 18 to model Monif Clarke's clothing line after she was hired as the face of the latest campaign for her swimwear line Sea by Monif C - a line that is specifically designed for women sizes 14–24. In the same month, she modeled for
Torrid. She also collaborated with the plus size clothing retailer Yours Clothing for the second time when she was officially announced as the face of their high summer campaign. In May 2015, she was featured on the cover of
People. In September 2015, Holliday starred in
H&M's
sustainable fashion campaign alongside singer
Iggy Pop, artist
Daniel Lismore, sex blogger Karley Sciortino and blogger Pardeep Singh Bahra. In the same month, she starred in
Addition Elle's fall 2015 capsule collection campaign. In the same month, she also confirmed that she was in the process of designing her own clothing line. In November of the same year, she was involved in a fashion shoot for
Marie Claire UKs December 2015 issue. In January 2016, Canadian plus-size retailer
Penningtons announced that the brand has partnered with Holliday to release a capsule collection bearing her name under their mblm label. ==Activism==