A celebrity known for always having an entourage of doppelgangers around them. Their doubles would be so good that people couldn't tell which is real. It starts as a publicity stunt and becomes part of the celeb's persona.
In the beginning, it serves as a publicity stunt, later it becomes a part of the celeb's identity.
The celeb feels more secure in numbers with less focus on them.
Ability to be "present" in multiple places at the same time and get more done.
A doppelganger is a biologically unrelated look-alike, or a double/twin, of a living person.
Always showing up surrounded by doppelgangers would create buzz and keep such a celeb in the spotlight.
This would be suitable for an upcoming celebrity who just had their first hit (movie, song, whatever). Someone who has recently caught the public's attention and becomes better known as the person who travels surrounded with doppelgangers.
Wardrobe schedule for doppelganger fans
As time goes on the celeb builds a larger fan base. Hardcore fans would want to be doppelgangers as well. To make it easy, the celeb would publish a list of styles (hair, clothes, everything) they will wear at future public events.
Growing number of doppelgangers
Sooner or later, people would start applying for the doppleganger entourage. It lets the celeb adjust the size of their entourage based on the occasion.