4. Justin Bieber
Who would have thought that by the end of 2015, all of us, as in all of us would become or re-become Beliebers? Biebs sure know how to make the best comeback with his record-breaking “Purpose” album. So, how to dress up like Justin Bieber, you say? You can pick from the “Baby”-days Bieber and the hot guy Biebs that he is now. For the “Baby” Justin, all you’ll need is a purple long sleeve shirt and black pants. On the other hand, if you want the more mature-looking JB, you can pull it off with an all-black attire paired with a black bull cap. Oh, we almost forgot the “Looking-beyond-horizon-wearing-nothing-but-tattoos”-kind of Bieber! If you want to go with that getup, it’s really up to you.