Inside Selena Gomez’s Star-Studded ’70s B-Day Bash — With Taylor Swift, Benny Blanco + Zero Chill [PICS]

This birthday had no chill.

Selena Gomez, who turns 33 on Tuesday (July 22), celebrated early with a glitter-drenched, ’70s-themed bash that brought out her inner Studio 54 queen — and a few of her A-list besties.

Among them? Taylor Swift, in full cool-girl mode, and Gomez’s future husband, Benny Blanco.

The Only Murders in the Building star shared a balloon-filled photo dump on Instagram Sunday, rocking a sequined jumpsuit, white fur coat, and peak disco diva energy.

Swift posed by her side, repping her signature red lip, proving once again that these two are the blueprint for iconic pop girl friendships.

Other highlights included a rooftop moment with Sofia Carson and a very public (and very cute) smooch with Blanco, 37.

Yes, the PDA made it to the main feed.

“As I prepare to celebrate my 33rd birthday, I can’t help but reflect on the incredible journey that has brought me here,” Gomez captioned the glam dump. “This past year has truly been the most beautiful year of my life.”

READ MORE: 5 Things Benny Blanco’s Love Taught Selena Gomez About Herself

She thanked fans for their love, called the year unforgettable, and signed off with: “MADLY LOVE YOU ALL.”

We love a sentimental queen with glitter in her lashes.

Wedding Watch: Taylor & Travis on the Guest List?

Gomez and Blanco are reportedly tying the knot this September in Montecito, Calif.

And "Naturally," her bestie will be there — with Travis Kelce in tow.

READ MORE: Travis Kelce Denies That He + Taylor Swift Do This in Public

According to Daily Mail, the couple’s big day will be a private, two-day celebration for close friends and family — “many of whom happen to be huge celebrities,” because, of course, they are.