One direction used to be the biggest boy band. They went on a hiatus in 2016. It consisted of Harry Styles, Louis Tomlinson, Niall Horan, Liam Payne and Zayn Malik. People part of their fandom were called Directioners. People who met them were very lucky.
"yo dude, I met One Direction!"
"Mate, that's awesome! You're so lucky!"