He's a viner with more than 4M+ followers.
I personally cannot stand him. He thinks he's better than everyone else because of his fame from Vine. I don't find him funny at all, and yet he has 1M+ followers on Vine, Twitter, and soon to be YouTube. He recently joined YouTube, and quickly gained a lot of subscribers/views. Bit of a slap in the face to all of us other YouTubers who spend hours preparing, filming, and editing our videos. He got popular for something he did in 7 sec. Which, most of his popularity came from vines with his sister "harmonizing" songs together.
He's a fine example how looks determine popularity. I don't find him entertaining at all, but since he's "good looking", he quickly rose to fame.
He is also a complete douche. He said that his idea of a "perfect" girl was for her to be herself, but then says she needs to meet a bunch of requirements. (Like long curly brunette hair, no body hair, skinny, etc.). He's very rude to people who message him anything slightly negative. He's very rude to homosexuals, and has tweeted some offensive things about them.
He's basically one of those people who let fame get to his head, and made his ego go through the roof. The only real reason why he's popular is because of his looks.