The 1980s was also known for bright colors and playful styles of clothes. But boy bands? No, not really. The 80s saw popular rock acts though.
So perhaps these guys wanted to fuse the boy band concept with the fashion of 1980s. Yes we know they look absolutely ridiculous. But hey, they nailed the coordinated outfits!
Truth be told, every girl has a dream date. Who would you take to prom? For starters, you'd want someone who you'd be able to have a good time with. Likewise, you want someone who'll make you the envy of every girl there, or at least someone who'll get everyone's attention.
Going to prom with Han Solo? Why not! Sometimes, taking a life size cardboard cutout would be better than to spend the night with a date that you don't like. Right?