Happy National BFF Day!

What better way to celebrate friendship than by looking at some of our favorite ~famous~ besties. On June 8, make sure to remind your pals just how much you love them by posting those super cute selfies to Instagram. If you're in need of some inspo, take a tip from celebrity duo Justin Timberlake and Jimmy Fallon.

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"It’s not often that you meet people that are as genuinely nice as Jimmy, but he also has this unabashed joy," Justin told GQ in 2011. "He’s so earnestly curious about what could be funny and what could be exciting."

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Though we might not boast the net worths these two have, the friendship between Jimmy and Justin is so relatable. Their bromance began in the early 2000s when they met backstage at the MTV Video Music Awards. Jimmy, a Saturday Night Live cast member at the time, was hosting and Justin was preparing to perform for the first time since leaving NSYNC.

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"I remember talking backstage during those VMAs," Jimmy reminisced. "I was totally nervous and you were nervous and we both ended up having a good night. We’re good luck to each other — like each other’s rabbit foots."

Over a decade later, the pair is still inseparable. Justin often appears on The Tonight Show to perform skits and Jimmy even interrupted the singer's wedding to Jessica Biel.

Click through the gallery below to see your favorite celebrity BFFs then vs. now!