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Zack and Afften dont hesitate to strip down for the first time in Guyana. Now that theyve met, theyre ready to take on the 21-Day challenge. <br> <br>Naked and Afraid takes survival of the fittest to the next level. Each week, a new pair of complete and total strangers - one man and one woman - will find . <br> <br>Alison and Jonathan meet each other for the first time - completely naked. Now they have to survive! | For more, visit . <br> <br>The Frozen star told Ellen she was a big fan of the reality show. Naturally, Ellen gave her the chance to be on it herself.