Sexy 90's Boy Band - Backstreet Boys, 'N Sync, 98 Degrees, Hanson, Boyz II Men, the list of 90's boy bands goes on for miles. This is a super easy costume, and there are many options available, but a minimum requirement of 3-5 people to make it work. With wardrobe, matching is key. Baggy jeans and tight turtle neck shirts, or some hot flannel button-ups, and greased up hair. If you want to really play some games with the hearts of 90's girls everyone, black slacks, unbuttoned dress shirts, slicked back hair, and buckets of water poured over you will do the trick.