This is Troye Sivan Mellet, better known as Troye Sivan. He is a youtuber at the same time a singer-songwriter. He was born in Johannesburg, South Africa and is Australian. Troye has a song in the movie called, "The Fault in our Stars", which is already famous in some countries. As an actor he played the young James Howlett in the 2009 X-men film X-men Origins: Wolverine. How amazing and talented is he! So here is Troye.