These are the craziest Bear Grylls celebrity challenges ever! Were looking at the grossest, most grueling moments where celebs were pushed to their limits by Bear Grylls. From Courtney Cox to Zac Efron, these celebs were tested ruthlessly and some may or may not have drunk their own urine. Did we miss any celebrities and that were featured on a Bear Grylls show? Let us know in the comments!

#10. Courteney Cox
#9. Thom Evans
#8. Channing Tatum
#7. Mel B
#6. Zac Efron
#5. Stephen Fry
#4. Drew Brees
#3, #2, #1 ????

Check out these other Bear Grylls videos!
Top 10 Insane Bear Grylls Moments: https://www.youtube.com/watch?vzxQU55pItxU
Top 5 Myths About Extreme Survival: https://www.youtube.com/watch?v0JndnDHVdxg
Top 10 Survival Skills You Need To Know: https://www.youtube.com/watch?v9ncC1R2klvE

Suggest ideas over at MyMojo! http://www.watchmojo.com/suggest

Check our our other channels!
http://www.youtube.com/mojoplays
http://www.youtube.com/mojotalks
http://www.youtube.com/msmojo
http://www.youtube.com/jrmojo
http://www.youtube.com/watchmojouk

WatchMojos Social Media Pages
http://www.Facebook.com/WatchMojo
http://www.Twitter.com/WatchMojo
http://instagram.com/watchmojo

Get WatchMojo merchandise at shop.watchmojo.com

WatchMojos ten thousand videos on Top 10 lists, Origins, Biographies, Tips, How Tos, Reviews, Commentary and more on Pop Culture, Celebrity, Movies, Music, TV, Film, Video Games, Politics, News, Comics, Superheroes. Your trusted authority on ranking Pop Culture.