7 ms·TikTok is on fire because it shows young girls dancing in their underpants. That's it.by overtonwhy 4y agoTikTok is on fire because it shows young girls dancing in their underpants. That's it.coverband 4y agoGuess you didn't watch the viral video of the guy on skates with a drink in his hand, listening to Fleetwood Mac...kjeetgill 4y agoHaha, if that was true snapchat's discover stories would be more popular. Hit: it's not.