All kinds of brands would offer sponsorships for clothes, jewelry, and makeup.
When a celebrity's fame and status reached a certain level, they did not need to spend their own money for their getup when they attended these events.
The brand would go to them to sponsor their entire getup.
For instance, red carpet events where there would be great exposure. Netizens would see it and feel that it looked good, so this would be one effective way for the brand to raise its popularity.
But this was only one method.
The other method was casual shots of the celebrity's street fashion.
When a brand releases new products every season, they would package and send them to the celebrity.
The new products released every season would not be the design that would be released for that year but the design that would only be released for sale in the following year, and these would all be sent to celebrities first.