It takes a very special person to start a charity that benefits those in need, and as you'll see in this clip from "The Jeff Probst Show," Alanna Wall is one of those very special people. She's also just 12 years old! Alanna was only 10 when she started Polished Girlz, an organization that bring nail polish parties to girls that are hospitalized or have special needs.

Alanna's love of sharing nail art also comes with a message about how important it is to wash your hands. Check out the video to hear about all the great work that Polished Girlz does!

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Alanna Wall on The Jeff Probst Show

Aaron Collins was only 30 years old when he died unexpectedly. A few days later, his brother Seth was going through his things when he found, on his computer, a will. One of the instructions was quite explicit - Aaron wanted his family to leave a $500 tip to an unsuspecting waiter or waitress.

Seth and his mother, Tina, fulfilled Aaron's wish a few days later, and they shared a video of it on YouTube for some loved ones. They weren't expecting the video to go viral, but it did - and soon, a movement was born!

In this clip from "The Jeff Probst Show," Seth and Tina explain how their simple act of kindness on Aaron's behalf spread like wildfire, and inspired people to pony up tens of thousands of dollars so they can keep the $500 tips coming! If you'd like to learn more about how to get involved, visit AaronCollins.org.

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The film version of the steamy hit novel "50 Shades of Grey" is already one of the most anticipated movies around - and it hasn't even begun filming yet! But that hasn't stopped rumors from spreading about which actor will be cast to play the leading role of Christian Grey, the handsome millionaire with a secretive love life. One of the names that's making the rounds on the rumor mill is Colin Egglesfield, from "The Client List," "Rizzoli & Isles," and "All My Children."

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In this clip from "The Jeff Probst Show," Colin addresses those rumors head on - including what skills he's picked up on the set of "The Client List" that would come in handy to play Christian Grey!

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Lt. Chet Frith came back from multiple tours in Iraq and started suffering from an intense case of post-traumatic stress disorder. His lifeline? A service dog named Gunner. In this clip from "The Jeff Probst Show," Chet explains what he means when he says that Gunner, who is trained to keep an eye on Chet and his surroundings, saved his life. It's a touching story of what man's best friend can do!

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Caitlin Doughty studied medieval history in college, but found, after graduating, that it's not a field that lends itself to many job opportunities. So Caitlin, who has always been interested by death, decided to take a different path, and now, Caitlin is a mortician.

In this clip from "The Jeff Probst Show," Caitlin shares with Jeff the ins and outs of her career, including why she wears the clothes she wears, the outrageous questions people ask her parties, and how society has changed over the past 100 years when it comes to dealing with death.

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