May 25th is international “Towel Day“, celebrated every year around the world, to commemorate the memory of the late author Douglas Adams. What better way to celebrate, than to stare at a bunch of very hot (and famous) men, wearing nothing but a towel?

This series of photos is the brainchild of fashion photographer Mario Testino who’s been taking photos of famous guys (and girls) with a towel, for his Instagram account. Here are some of the best:

1. The latest one – the incredibly hot model, River Viiperi

TOWEL SERIES 111, RIVER VIIPERI. #MarioTestino #TowelSeries @riverviiperi

A post shared by MARIO TESTINO (@mariotestino) on

2. Yes, that’s Justin Bieber in a towel

3. Another handsome model – Wouter Peelen

TOWEL SERIES 109, WOUTER PEELEN. #MarioTestino #TowelSeries @WouterPeelen1

A post shared by MARIO TESTINO (@mariotestino) on

4. The Australian model, Jordan Barrett

TOWEL SERIES 105, JORDAN BARRETT. #MarioTestino #TowelSeries @Iblamejordan

A post shared by MARIO TESTINO (@mariotestino) on

5. The Stenmark Twins, Jordan and Zac

6. The Portuguese soccer star, Cristiano Ronaldo

TOWEL SERIES 24, @CRISTIANO RONALDO. #TowelSeries #MarioTestino

A post shared by MARIO TESTINO (@mariotestino) on

7. Spanish model and actor, Jon Kortajarena

TOWEL SERIES 99, JON KORTAJARENA. #MarioTestino #TowelSeries @KortajarenaJon

A post shared by MARIO TESTINO (@mariotestino) on

8. Actor and model, Alex Pettyfer

TOWEL SERIES 88, ALEX PETTYFER. #MarioTestino #TowelSeries @alexpettyfer

A post shared by MARIO TESTINO (@mariotestino) on

9. Hot model Bruno Endler

TOWEL SERIES 83, BRUNO ENDLER. #MarioTestino #TowelSeries @brunoendler1

A post shared by MARIO TESTINO (@mariotestino) on

10. American supermodel, Sean O’Pry

TOWEL SERIES 78, SEAN O'PRY. #MarioTestino #TowelSeries @seanopry55

A post shared by MARIO TESTINO (@mariotestino) on

11. Yet another hot model – Danilo Borgato

TOWEL SERIES 67, DANILO BORGATO. #MarioTestino #TowelSeries @DaniloBorgato

A post shared by MARIO TESTINO (@mariotestino) on

11. And one more Justin Bieber

12. Alex Valley staring back at you

TOWEL SERIES 138, ALEX VALLEY. #TowelSeries #MarioTestino @AlexValley

A post shared by MARIO TESTINO (@mariotestino) on

13. And Vito Basso showing… almost everything

TOWEL SERIES 128, VITO BASSO. #MarioTestino #TowelSeries @VitoBasso12

A post shared by MARIO TESTINO (@mariotestino) on