Who has degraded in looks? Who was more attractive than now? Keep it cute.
I have a few examples listed:
Mike Posner:
Now:

Then:
Looked way cuter on his debut era. That beard added some sexiness to him despite Timberlake comparisons.
Justin Timberlake:
Now:

Then:
Aged terribly. The wrinkles don't look cute on him.
Kanye West:
Now:

Then:
He remains a douche and whatnot but looked slimmer before he was with Kim.
Eminem:
Now:

Then:
I never found him specifically attractive (maybe in the early 2000s) but sometimes he tries to look hot. Right now he looks not.
Louis Tomlinson:
Now:

Then:
Never the prettiest and always receiving the 'ugly' nomination in various polls he had certain moments a few years ago. I would have even dared to place him above Harry.