Pakistan, Aug. 11 -- Hailey Bieber is celebrating someone who has played an important role behind the scenes of her beauty empire.

The Rhode founder recently shared a sweet birthday tribute to her business partner Lauren Ratner.

Taking to her Instagram Stories on Sunday, August 9, the model posted a candid photo of the two women together and affectionately called the skincare line president her "birthday angel."

In the photo, Justin Bieber's wife and the birthday girl are seen smiling inside what appears to be a private vehicle.

Ratner sits in the foreground wearing a textured cream-colored top and white bottoms, while the Baby hitmaker's partner poses behind her in an elegant strapless dress.

The relaxed snapshot captures the pair i...