Selena Gomez sizzles in red mini dress for 31st birthday bash with ...

Selena Gomez is red hot.

The newly-minted 31-year-old singer celebrated her birthday in style over the weekend with A-listers like Paris Hilton, Christina Aguilera and Benny Blanco by her side.

The “Only Murders in the Building” star shared a series of snaps from her party Saturday night where she wore a Bottega Veneta red mini dress with a sheer underlay and floral embellishments.

“31,” she captioned the photo dump.

Gomez paired her cleavage-baring ensemble with black Y2K sunglasses, diamond hoop earrings and strappy black pumps featuring a red rose.

The Rare Beauty founder, who appeared to borrow a guest’s black blazer later in the night, opted for a smokey cat eye and nude lip color as she swept her hair back into a glamorous updo.

Even her cake was on-theme, as she was pictured blowing out giant sparklers on the dessert adorned with red flowers.

More snaps showed Gomez posing with Hilton – whom she bonded with at Britney Spears’ wedding to Sam Asghari last year — and former collaborator Blanco, who fans previously accused of throwing shade at the Disney Channel alum.

In a 2020 interview, the “Eastside” hitmaker seemingly called her a “cookie-cutter pop star” while comparing her work to that of ex-boyfriend Justin Bieber.

“Justin’s not one of those cookie-cutter pop artists,” Blanco said at the time.

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“Like, you know, they’re like, ‘This is my new single and here’s my makeup line.’ And he’s like, Justin’s like, ‘Yo. I have a pimple and I have anxiety today.’”

Other photos from the star-studded affair showed the Rare Beauty founder crouching down to pose with Aguilera, before cuddling up to model Connor Franklin and singers Sabrina Claudio and Karol G.

Noticeably absent from the bash was her pal Taylor Swift, who is currently on her Eras Tour, and fellow BFF Nicola Peltz, who is on vacation in Saint Tropez with her husband, Brooklyn Beckham.

“Happy birthday to my soul sister @selenagomez ???? I love you more than you know. I am so blessed to have you by my side in this life thank you for being such a beautiful light in this world ????,” Peltz captioned an Instagram post in lieu of her attendance.

Earlier in the day, Gomez commemorated her big day with a sweet message to her fans.

“I am thankful for so much in my life and one of the things I am most thankful for is the work we’ve been able to do with the Rare Impact Fund through @Rarebeauty,” she captioned a photo of herself blowing out candles.

“Because of YOU we’ve been able to raise awareness and increase access to mental health services for young people. This is my true passion in life.”