The answer to this is One Direction. There are a lot of people who immediately became fans of One Direction when the band was formed. People had their own favorites and they were able to produce songs that people would sing continuously because they are so catchy. It was a surprise when Zayn Malik decided to leave the band.
The band decided to push through with only four members composed of Harry Styles, Louis Tomlinson, Liam Payne, and Niall Horan. Some fans have speculated that the other four members were devastated with Zayn’s departure. Then again, these things are only speculations and people do not know for sure how they felt.