The same day she filmed herself complaining about damaging her hair too much with bleach, reported Us magazine.
The 18-year-old reality star wore her long, straight hair down for the event, contrasting the deep blue with a bright salmon pink dress.
"Navy (love)," she captioned one split-image Instagram of herself at the event.
Earlier in the day, the "Keeping Up With the Kardashians" star lamented the pains of being a hair chameleon to her close friend Gary via a Snapchat video she shared with fans.