It's not like Irina and Bella were extremely popular or anything, but they had a solid fanbase. So yes, they were popular, no matter how much they denied it.
There were a lot of people in love and crazy about them, and when I say a lot, I mean that even though they weren't really celebrities, they were in the top 10 most influential people in every possible ranking.
Especially Irina.
Amany walked on the edge, she was building her career in a different way and she preferred not to get too involved with everything that involved 'Unbreakable'. But that was very hard to do with Irina and Bella. After all, they had been part of it from start to finish.
Unbreakable was entertainment like any other, attracting people's attention and admiration. A lot of admiration.
So a lot of people actually followed Bella's and Irina's schedules, especially Irina who had a schedule of her own, after all, her advisors kept her up to date, even if only superficially.