Today is Instagram's four-year anniversary! Which also means it's been four years since we first started following our favorite stars' accounts. How did we survive before the photo-sharing platform existed? What did we do before filters?!
To commemorate Instagram's milestone, we're taking a look back at your favorite celebs' first pics and captions! Click through to see photos taken by stars like Justin Bieber and Ariana Grande, then let us know which photos you love most in the comments below. Do any of the pics surprise you?
Justin Bieber: "Happy bday baby"