Fans were totally shook yesterday when Zayn Malik posted the cutest birthday message ever for his girlfriend Gigi Hadid. They are seriously adorable together and while they don't share a lot about their intimate relationship on social media, this was just enough to get everyone talking. While the world was buzzing about Zigi, we were thinking about all of the other birthday messages celebs put on social media for their significant others.

After doing a bit of investigating, we've realized that some of these birthday messages are really, really freaking romantic. From the photo they share to the language they use to describe the love of their life to the details they give up about their relationship is just downright amazing.

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We've decided to compile a bunch of birthday messages from some of our favorite couples over the past few years. Yes, there are several of these couples that aren't together anymore but we're taking a trip down memory lane here – so just go with it.

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From Justin Bieber wishing Selena Gomez a 'happy birthday' as well as plugging her upcoming movie to Bella Thorne calling Gregg Sulkin a 'manly man', we can not get enough! Not to mention, Dove Cameron's shout out to her current boyfriend Thomas Doherty is literally adorable and super flirty at the same time, we're all about it.

Click through the gallery and check out some of the best celebrity couple birthday shout outs over the past several years!

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