A sea of bows, heels, stuffed animals and crowns waited for the gates of Crypto.com Arena to open Saturday night. The sold-out crowd was there to see Laufey, the Icelandic-Chinese singer-songwriter whose blend of jazz, classical and bossa nova — with a hearty sprinkling of modern pop — is unlike anything in the music industry right now.

The A Matter of Time tour shares a name with Laufey’s latest album. It was strictly formal inside: A woman affixed a bow on her boyfriend’s head as he tried to add a hat to his ensemble. Parents, siblings and romantic partners happily entered the venue together in style. One of those parents was Matt Hutchinson, who arrived with his daughter, Eleanor.

“From what I’ve heard, [her music] seems really soulful and jazzy, and I’ll be excited to hear it,” Hutchinson said.

It’s an apt description for Laufey, but it didn’t exactly fit the opener, Suki Waterhouse. Her band came on stage with a rocking opening that left the jazz-trained audience a bit confused. Still, Waterhouse was a self-proclaimed Laufey fan. She dedicated multiple of her songs to the “lover girls out there,” a nod to Laufey’s hit single, “Lover Girl.”

As soon as the last guitar riff ended, though, it was back to Frank Sinatra over the speakers. Luckily, the fans knew exactly what they were getting themselves into.

“I’m gonna cry. I just know I’m gonna cry,” said Amy Castro.

Arena-size shrieks usually reserved for legends of the music world instead accompanied the young cellist, and the crowd was game, from an elementary-aged girl in a sequined dress to a middle-aged man in a Letterboxd t-shirt. Beyond a few TikTok-era flourishes here and there, like a screaming audience singalong to a viral verse from her track “Tough Luck,” the concert featured traditional music reborn for the 21st century, and the crowd loved it.

“I just love that jazzy, pop sound and how she has her own orchestra. It’s just really pretty,” said Natalie Sanchez, a sophomore at Antelope Valley College. “I like to listen to it when I’m studying. It helps me focus.”

Laufey first emerged in a flowing dress to a crowd that initially shouted and stood but eventually learned to sit, relax and harmonize when possible. It was a mostly PG tale of heartbreak and insecurity, giving way to an elegant self-confidence. Instead of aimless yelling and clapping, the crowd perfectly matched the staccato clapping pattern of “Lover Girl.”

After a rollicking first 30 minutes — at least, by jazz standards — Laufey turned a 19,000-seat arena into an intimate jazz club with her performance of “Valentine.” A standout ballad about a first love from her debut album, “Everything I Know About Love,” “Valentine,” among other tracks, were carefully rearranged for a more swinging speed befitting the club-style nature. Then, Laufey brought out red-hot K-pop group KATSEYE to deafening roars. Their performance of the group’s song “Gabriela,” with Laufey in tow, received one of the longest ovations of the night.

Hype-inducing cameo aside, the night delivered on a different purpose from a typical arena show — at least for Castro.

“All her music in general just calms me down. It’s really peaceful,” Castro said.

In the middle of yet another bewitching ballad, “Let You Break My Heart Again,” a solitary man let out a “YEAH!” Somehow, playing the cello amid a ballet interlude in a place named after a cryptocurrency website didn’t feel strange after a while.

Near the end of the concert, Laufey performed her viral hit “From The Start,” which ended with confetti showering on an adoring crowd. The artist sent everyone swooning home with one last tear-jerking encore: the devastatingly beautiful “Letter To My 13 Year Old Self.”

For one night, at least, it was far from a curse to be a lover girl. Ricardo Escelante, who accompanied Castro to the show, was one of the boys who were more than happy to look on.

“I’ll be too busy watching this one cry,” Escelante said of Castro.