Happy Birthday! No, not to Emmy-nominated Selena Gomez's birthday. We want to pay tribute to the butter yellow trend.

In recent months, this pastel color has quickly taken over TikTok feeds, runway collections, and celebrity styles. Selena Gomez is the latest example, celebrating her 32nd birthday in pale yellow.

By all appearances, Gomez's July 22 celebration was truly idyllic. Her best friends, the beachfront view, and her boyfriend Benny Blanco. Her attire fit the laid-back vibe of the birthday party; the “Lose You To Love Me” singer posed in a pastel romper from Free People under a palm tree and “Happy Birthday Selena” balloons.

The $78 onesie was subtly Cotajecoa-esque with a ruffled neckline and bow detailing. The oversized fit, on the other hand, was casual and cute, like a breezy sundress. Like the models, Gomez styled them with cozy tube socks.

Gomez took the Beauty Mogul title in stride, debuting tousled beach waves and rosy glamour (probably courtesy of her makeup brand, Rare Beauty) for the occasion. She completed the simple, sweet look with a thoughtful nod to her boyfriend by simply accessorizing with a $600 gold chain with a diamond-studded “b” from luxury jewelry designer Baby Gold

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This was months after Sabrina Carpenter celebrated her 25th birthday in a similar shade of mellow yellow. While Gomez was dressed in tropical cool, Carpenter was dressed in glamorous attire. She wore an early 2000s slip dress reminiscent of Kate Hudson's famous “How to Lose a Guy in 10 Days.”

Celebrity endorsers like Katie Holmes and Jennifer Lawrence also endorsed the color, making it definitely a butter-girl summer.