#TGITW: thank goodness it's the weekend!
Young people on Twitter had a lot of reasons to be happy on Friday -- from the obvious “Harry, Niall, Zayn, Louis, and Liam,” to “my amazing family" (aww) -- and the hashtag #reasonsthatismile was propelled into a heartwarming worldwide trending topic that we couldn't resist turning into a slideshow for you. Here are 15 of our favorite reasons to smile from yesterday's twitterverse, and we want to know: What is making you :) today? Tweet @huffpostteen or share in the comments!
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