September 4 is a big day for the Beyhives around the world: Beyoncé just turned 38 yesterday!

And among the millions who greeted Queen B on her very special day was Mariah Carey. The diva took to her Instagram page to celebrate her good friend's birthday with a throwback photo. "Happy birthday 👑🐝 @beyonce!" she simply wrote alongside the snap.

 

 

 

 

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A post shared by Mariah Carey (@mariahcarey) on Sep 4, 2019 at 2:02pm PDT

The diva duo has managed to remain tight-knit over the years despite being pitted against each other all the time. FYI, they shared a selfie back in December 2016 as well when Queen Bey attended the Mariah Carey: All I Want For Christmas Is You show with her daughter Blue Ivy in New York City.

 

 

 

 

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A post shared by Mariah Carey (@mariahcarey) on Dec 11, 2016 at 8:41pm PST