"The Trending 20" is a regular series where we round up interesting, informative and hilarious tweets from worldwide Twitter trending topics, fueled by young tweeters on the interwebs. Have one to submit? Give us a shout @HuffPostTeen.
One thing's for sure: watching "High School Musical" as a kid may have left you with a few unrealistic expectations about your teenage future. And if today's worldwide trending topic on Twitter, #GrowingUpIBelieved, is any indication, you were definitely not alone.
"HSM" woes aside, young people on the Twitterverse shared silly things they believed as children that turned out to be 100 percent wrong when they hit their teen years, from the existence of the Boogeyman to finding Prince Charming. Click through a sampling in the slideshow below and share your own additions in the comments, or tweet @HuffPostTeen!