Olivia Rodrigo's 21st Birthday Dress Is a Y2K Daydream

Olivia Rodrigo may need to get a new driver's license. The singer turned 21 on February 20, and she even launched a "Spicy Chip" shot glass in her store to commemorate the occasion. But before the clock struck midnight, she celebrated her last "underage drinking" in style.

On February 19, just days before she embarked on her Guts world tour, Rodrigo shared photos from her 21st birthday — which was, of course, a family gathering. There, she blew out multiple candles on a purple funfetti cake, surrounded by celebrity friends including Conan Grey, Iris Apatow, Tate McCrea and The Kid Laroi. Naturally, her birthday party took center stage.

Rodrigo's cutout mini dress

For the evening, Rodrigo wore a backless black mini dress with a halter neckline and small keyhole cutouts. Rodrigo had more cutouts on her sides, and she showed off the most "I've officially grown up" accessory (just ask Manny Santos): a rhinestone-encrusted thong.

Olivia Rodrigo's 21st birthday outfit. Instagram/Olivia Rodrigo

The shimmering lingerie became an accessory, deftly peeking out from under her tulle dress. Rodrigo completed the look with a pair of hoop earrings and a few chunky silver rings (her statement jewelry of choice), giving the look her signature punk flair.

Olivia Rodrigo's 21st birthday accessories. Instagram/Olivia Rodrigo

Last year’s birthday look

Rodrigo has the ability to take away the "discomfort" of his birthday. In February 2022, she celebrated her 19th birthday by attending a party in a silky hot pink camisole paired with a matching crop top and skirt. The star of her look was a sparkly pink cowboy hat that read "Birthday Girl."

Olivia Rodrigo's 19th birthday look. Instagram/Olivia Rodrigo

She may be a Pisces, but these looks give Leo energy.