How to get a celebrity's attention?

[Fearlessoatmeal569]

There's a boy from a boyband that aren't that big like 1D famous and he's only 17 so all the members are young. He follows me on twitter and only follows over 1,000 people and he has 90K followers but I don't know what to DM him which could get me noticed and have a conversation or even regular conversations. Also I'm going to see him live as a support act for someone soon and they usually do meet ups after because they aren't very big... Please help on how I can message him, it would be amazing and all the boys I like are famous or Youtubers and can never find anyone i like in the 'real world' just imagine if it works out and if you were me so no bad horrible comments.. It could happen its not like he's Harry styles