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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

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

3. Another handsome model – Wouter Peelen

4. The Australian model, Jordan Barrett

5. The Stenmark Twins, Jordan and Zac

6. The Portuguese soccer star, Cristiano Ronaldo

7. Spanish model and actor, Jon Kortajarena

8. Actor and model, Alex Pettyfer

9. Hot model Bruno Endler

10. American supermodel, Sean O’Pry

11. Yet another hot model – Danilo Borgato

11. And one more Justin Bieber

12. Alex Valley staring back at you

13. And Vito Basso showing… almost everything