Gigi Hadid, a Reebok ambassador, stepped out in New York Thursday for an event for the brand wearing some of the athletic line's latest offerings. The model sported bold red leggings along with a crop top. Fashion website WhoWhatWear is now predicting that red leggings will be a major trend at the start of 2018, citing Hadid as a frequent trendsetter when it comes to leggings.