vlada-sasha-natasha answered:
money, popularity and recognition. after john galliano, karlie’s career took a different path, she became a vs model and start selling cheap clothing for white american girls, even tho she was popular in hf at the time, when she started working for vs she wanted the recognition of her own country, i think she wasn’t totally satisfied with her hf modeling career, she wanted to became more famous and what a better way to use VS & Taylor swift ( this are just assumptions , nothing is real)