It's an important day for Fifth Harmony fans. The band formed on X Factor on July 27, 2012, so it's a monumental occasion. The girl group just turned four years old, and Harmonizers have been reflecting on all of the good times with the hashtag #4YearsOfFifthHarmony.

Since it's been a while since they formed, the band has changed a lot, but they're also the same group of girls we know and love! Need proof?

Click through the gallery to see then-and-now photos of 5H.

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