10. Jimmy Fallon
Jimmy Fallon had more of a mustache in high school than he has now. Poor guy. We're guessing he didn't do too well with the ladies back then.
9. Madonna
Look at that conservative vest and sweater on Madonna in high school. The Material Girl hasn't wore that much material since her days as a teenager.
8. Katy Perry
Perry is the daughter of a preacher. And she looked the part back in high school. Those innocent days are far behind her, however.
7. Kim Kardashian
It's amazing what a lot of makeup and some rumored butt implants can do, huh? We're not sure if Ray J would have filmed himself having sex with Kim Kardashian back in the day.
6. Tom Brady
Yes, someone who once looked like this is now married to a woman who looks like THIS. There's hope for all of us, fellas. (As long as we're really good at throwing a football.)
5. Dwayne Johnson
Oh my God! We love this!!!! Look at how fat Johnson was back in high school!
4. Kesha
And we have a winner. If we showed you that first photo, what are the odds you would have identified that young woman as Kesha? Be honest!
3. Drake
Glasses! An Afro! A JEAN JACKET!!! Yes, Drake has come a very long way since high school, though he loses some hot points for that "Hotline Bling" dance.
2. Calvin Harris
What a difference a few years can make. The first photo was snapped in 2008. Fast forward to 2015 and Harris is modeling for Armani while doing the deed with Taylor Swift.
1. Nicki Minaj
No, really, that's a photo of Minaj from her days as a student at New York’s LaGuardia High School of Music & Art. She's grown a lot fiercer since, huh?
Source: http://orzzzz.com/top-10-hot-celebrities-who-werent-always-so-hot.html