Summer hats! They're a thing, and celebrities love 'em. Why, you ask? I can only assume that it's the priceless combination of privacy (as much as a hat will give) and skin-protection, but in reality, who knows?
Below are some of the best ~celebrity hats~ we've seen this season.
1. Reese Witherspoon

JKING/FAMEFLYNET PICTURES
2. Jeff Goldblum

Ink / INK/FAMEFLYNET PICTURES
3. Mandy Moore

Osvaldo / Osvaldo/TrickyD/FAMEFLYNET PICTURES
4. Celine Dion

Best Images / Best Images/FAMEFLYNET PICTURES
5. Cher

Massimo Sestini/FAMEFLYNET PICTURES
6. Jenna Dewan-Tatum

Osvaldo / Osvaldo/FAMEFLYNET PICTURES
7. Julie Bowen

Dmac / Dmac/FAMEFLYNET PICTURES
8. Adam Sandler

Stoianov / Stoianov/FM/FAMEFLYNET
9. Naomi Watts

Fameflynet Pictures / FAMEFLYNET PICTURES
10. Eddie Murphy

Bruce / Bruce/Javiles/FAMEFLYNET PICTURES
11. Hailey Baldwin

Vem / VEM/FAMEFLYNET PICTURES
12. Sam Heughan

Teach / Teach/Moryc Welt/FAMEFLYNET PICTURES
13. Sharon Stone

O. Duran / O. Duran/4CRNS/FAMEFLYNET PICTURES
14. Jennifer Westfeldt

Premiere / Premiere/RR/FAMEFLYNET PICTURES
15. Benedict Cumberbatch

Vasquez / Vasquez/FAMEFLYNET PICTURES
16. Ansel Elgort

Yellow Mamba / Yellow Mamba/FAMEFLYNET PICTURES
17. Tom Petty

Yellow Mamba / Yellow Mamba/FAMEFLYNET PICTURES
18. Kendall Jenner

Lc / LC/FAMEFLYNET PICTURES
19. Lily Collins

Fameflynet Pictures / FAMEFLYNET PICTURES
20. Leonardo DiCaprio

Fameflynet Pictures / FAMEFLYNET PICTURES
21. Calista Flockhart

Stoianov / Stoianov/FAMEFLYNET PICTURES
22. Tia Mowry-Housley

Yellow Mamba / Yellow Mamba/FAMEFLYNET PICTURES
23. Vanessa Hudgens

Vm / VM/FAMEFLYNET PICTURES
24. Brad Pitt

Bjj / BJJ/Stoianov/FAMEFLYNET PICTURES
25. Tish Cyrus

Yellow Mamba / Yellow Mamba/FAMEFLYNET PICTURES
26. Hilary Duff

Terma / Terma/SL/FAMEFLYNET PICTURES
27. Rita Ora

Ini / INI/FAMEFLYNET PICTURES
28. Renee Zellweger

Cpr / CPR/FAMEFLYNET PICTURES
29. Steve Martin

Yellow Mamba / Yellow Mamba/FAMEFLYNET PICTURES
30. Jake Gyllenhaal

Ram / RAM/FAMEFLYNET PICTURES
31. Elizabeth Banks

Gamr / GAMR/FAMEFLYNET PICTURES
32. Lori Loughlin

Yellow Mamba / Yellow Mamba/FAMEFLYNET PICTURES
33. Cristiano Ronaldo

GTRES/FAMEFLYNET PICTURES
34. Bono

Best Images / Best Images/FAMEFLYNET PICTURES
35. Rebel Wilson

Fameflynetuk / FameFlynetUK/FAMEFLYNET PICTURES
36. Ben Affleck

Boaz / Boaz/FAMEFLYNET PICTURES
...though something tells me this may be his year-round hat, too.