Dumb Luck

What would you call that instance where you just meet someone who lets say, a famous rockstar?

Calum seriously didnt know that. He just liked to ship Larry, he didn't really expect to meet famous people on tumblr.

To the rest of the world, Luke Hemmings was the Lead Vocals of 5 Seconds of Summer, But to Calum, he was just plain old Luke, funny, cute and socially awkward.

Would you call that....

Fate?

Coincidence?

Chance?

or just plain old..

Dumb Luck?