One celebrity that I know of for sure that uses Snapchat is Taylor Swift.
This is what makes me think that: She is dating the Snapchat CEO!
There are also stories like this which discuss all the different celebrities that use Snapchat:
The two problems with working out which celebrities use Snapchat are:
1. Even celebrities use Username instead of their real names
2. A lot of them are worried that private images might be screenshotted and shared to the public...
3. Snapchat is well-known for sexting, so they might get accused of that if the media finds out they are a Snapchatter.
