24. Justin Timberlake

If you’re a stickler for cleanliness, we bet you’re nothing like how Justin Timberlake is. It is rumored that the singer is very health conscious (read: germophobe), that he has someone disinfect all the doorknobs of any backstage venue or hotel he is performing or staying in. He requires that this be done once… EVERY TWO HOURS. He also demands that an entire hotel floor be closed off for him and have an elevator dedicated for only himself to use.