Here's one important thing that One Direction's Harry Styles shares with his fans: big hearts! Thanks to a concerted online effort by Directioners, Harry made a cancer-stricken fan's dreams come true!

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He didn't stop there, however: Harry also Skyped with the teen AND vowed to get a cancer-ribbon tattoo in her honor! Kelcey was so excited, according to her mom, that her oxygen had to be adjusted. Her friends were thrilled with the outpouring of support on the Internet. "She is one of my best friends," said Sarah Jeffers, who helped kick-start the campaign. "This is the one thing we could do for her."

Another exciting bonus? Styles is now following Kelcey on Twitter -- along with 32,000 others, including Katie Couric and the LiveStrong Foundation. Send your best wishes to Hallinan with the hashtag #KelceyStrong!