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Benedict Cumberbatch, Kristen Stewart, Sarah Jessica Parker, Tom Hiddleston, Justin Bieber, hot or not

It's a debate that goes as far back to the days of the cave people, where people would sit around the fire after a day of hunting and/or gathering and decide whether the people in the surrounding caves were attractive or not. It's just what we do as humans. We judge people's faces. We can't help it.

And now that we have celebrities who are in our TV screens and movies theaters and on our magazines, we have a whole army of attractive people to stare at. And with that staring comes the inevitable question: is this celeb hot or not?

There are so many actors and actresses that the world cannot unanimously decide on regarding their hotness factor. And people will argue to the point of ruined friendships over whether someone like Benedict Cumberbatch or Sarah Jessica Parker is hot or not. It's quite an interesting phenomenon when you find a celeb super sexy, and yet your best friend can barely stand to look at them on the red carpet. 

So we came up with a list of 38 stars that are known for causing fierce debates when it comes to their physical appearance. This is not about their acting ability or their personality or whatever. This is all very shallow so just let it happen.

To be clear: we are not saying that any of these people are ugly or not attractive. We are just observing the polarizing reaction each of these celebs receive whenever they hit the red carpet or the Internet.

Take a look at them and cast your vote. Choose your side! Make your stance known! FOR SCIENCE!

1. Benedict Cumberbatch

Benedict Cumberbatch

Jason Merritt/Getty Images

2. Kristen Stewart

Kristen Stewart, Kids Choice Awards

Frazer Harrison/Getty Images for KCA

3. Sarah Jessica Parker

Sarah Jessica Parker, MET Gala

Julian Mackler/BFAnyc/Sipa USA

4. Miles Teller

Miles Teller

Mike Marsland/WireImage

5. Josh Hutcherson

Josh Hutcherson, Teen Choice Awards

Kevin Winter/Getty Images

6. Anne Hathaway

Anne Hathaway

Melissa Hebeler

7. Justin Bieber

Justin Bieber

Bill Davila/startraksphoto.com

8. Cara Delevingne

Cara Delevingne, MET Gala

Dimitrios Kambouris/Getty Images

9. Adrien Brody

Adrien Brody, hot or not

Venturelli/Getty Images for BVLGARI

10. Joseph Gordon-Levitt

Joseph Gordon-Levitt

Kevin Winter/Getty Images

11. Tom Cruise

Tom Cruise

AKM-GSI

12. Russell Brand

Russell Brand

Alo Ceballos/GC Images

13. Tobey Maguire

Tobey Maguire, hot or not

Jemal Countess/Getty Images

14.  Jay Z

Jay Z, Jay-Z

Prince Williams/FilmMagic

15. Martin Freeman

Martin Freeman, hot or not

Simon James/WireImage

16. Eddie Redmayne

Eddie Redmayne

Larry Busacca/Getty Images for BFCA

17. Benicio Del Toro

Benicio del Toro

Jason Merritt/Getty Images

18. Matt Smith

Matt Smith, Dr. Who

BBC

19. Katy Perry

Katy Perry, American Music Awards

Michael Buckner/AMA2013/Getty Images for DCP

20. Tom Hiddleston

Tom Hiddleston

Courtesy: Alberto E. Rodriguez/WireImage

21. Miley Cyrus

Miley Cyrus

Larry Busacca/Getty Images for NARAS

22. Damian Lewis

Emmy Awards, DAMIAN LEWIS

ABC/TODD WAWRYCHUK

23. Elisabeth Moss

Elisabeth Moss

Jason Merritt/Getty Images

24. Jason Sudeikis

Jason Sudeikis,SNL

Dana Edelson/NBC

25. Tilda Swinton

Tilda Swinton, hot or not

VALERY HACHE/AFP/GettyImages

26. Cameron Diaz

Cameron Diaz

Sasha, PacificCoastNews.com

27. Mark Ruffalo

Mark Ruffalo

Andrew H. Walker/Getty Images for Nantucket Film Festival)

28. Hilary Swank

Hilary Swank, hot or not

Brian Zak/Sipa Press via AP Images

29. Fred Armisen

Fred Armisen

Imeh Akpanudosen/Getty Images

30. Harry Styles

Harry Styles

Palace Lee/PacificCoastNews

31. Robert Pattinson

Robert Pattinson

Chris Pizzello/Invision/AP

32. Kaley Cuoco-Sweeting

Kaley Cuoco

Mark Davis/Getty Images

33. Jason Segel

Jason Segel, Bad Teacher, Onscreen Teachers

Courtesy of Sony Pictures

34. Adrian Grenier

Adrian Grenier

Courtesy of Michael Kovac/WireImage.com

35. Owen Wilson

Owen Wilson, hot or not

Elisabetta A. Villa/WireImage

36. Joaquin Phoenix

Joaquin Phoenix, hot or not

Dominique Charriau/WireImage

37. Jeff Goldblum

Jeff Goldblum

YouTube

38. Michael Fassbender

Michael Fassbender

Jason Merritt/Getty Images

So which unconventionally attractive celebs do you have it bad for? Is there any star not on this list that your friends are obsessed with but you still don't see the appeal? Let's talk it out in the comments. And then maybe next time we can list all the celebs that every single human on earth can agree is hot as hell.