Rihanna has lost approximately 1.2 million followers during Instagram’s clean up. Source: Getty Images

The social media site recently told all users, “Your number of followers has changed. We just completed a fix to remove spammy accounts.”

That’s bad news for stars who either attract large numbers of spam accounts or in some cases pad their followers by adding fake ones.

Kim Kardashian has lost a whopping 1.3 million followers. Source: AP

Many stars’ accounts are handled by a social media team, explains Michael Heller, CEO of Talent Resources. “It’s very inexpensive, so that’s why many social media teams [buy followers].” Web sites can charge just $30 for 2,500.

Whether the faux followers are paid for or not, the result of ­Instagram’s fake account purge has seen celebs’ numbers plummet.

Katy Perry has reportedly lost 300,000 followers on Instagram. Source: Getty Images

On Thursday, we noticed about 1.3 million of Kim Kardashian’s vanished. Rihanna’s decreased by about 1.2 million. Katy Perry’s went down 300,000. Even Oprah lost 100,000. Beyonce lost 830,000 but Justin Bieber has lost the most, with 3.5 million disappearing.

Check out the top 100 Instagram account losers here.

“It’s bad for a celeb for many reasons,” Heller said. “It’s embarrassing,” plus, “they also could lose lots of money.”

Brands pay up to $100,000 for posts and negotiate fees based on followers. Bravo’s Andy Cohen tweeted, “I lost 20k followers in the #InstagramPurge ... Twitter, next?”

This story originally appeared on The New York Post.