A new study has confirmed what we've long expected: Facebook is no longer the most popular social media site among teens ages 13 to 17.

The Pew Research Center revealed on Thursday that only 51% of US teens use Facebook. That's a 20% drop since 2015, the last time the firm surveyed teens' social media habits.

Now, YouTube is the most popular platform among teens -- about 85% say they use it. Not surprisingly, teens are also active on Instagram (72%) and Snapchat (69%). Meanwhile, Twitter followed at 32%, and Tumblr's popularity (14%) remained the same since the 2015 survey.

When it comes to the platform they access most frequently throughout the day, Snapchat is king.

Although the study was only conducted among nearly 750 teens in a one month period starting this spring, the new numbers might be worrying for Facebook. The company recently rebounded from its first-ever decline in users in the US and Canada. But overall, its global growth has slowed. The two countries account for 185 million daily users.

CNN