FaceApp privacy issues
A top US politician has called for the FBI to investigate FaceApp.
It allows people to edit their photos so they look older or younger and has gotten popular online this week.
But there's been privacy concerns over the Russian company that owns the app.
Chuck Schumer, the top Democrat in the US Senate, says it's "deeply troubling" that people's personal data could go to a "hostile foreign power".
The app is taking the internet by storm and celebrities are starting to jump on the trend.
Taking to Instagram, Courtney Cox shared the results of what she'll look like when she's older and it's hilarious
The actress only set up an Instagram account in Januray.
The Jonas Brothers also had a go at the app to see how they will look.
