Dua Lipa surprised fans by bringing her "personal hero" Gwen Stefani on stage during her latest show for a Don't Speak duet.

At her fourth and final Radical Optimism Tour show at the Kia Forum in Inglewood, California, on Wednesday night, the British hitmaker thrilled the crowd when she introduced the No Doubt frontwoman for a special performance.

Before bringing Stefani on stage, Lipa shared some heartfelt words.

"I wanted to dive into one of my personal heroes," the Levitating hitmaker told the crowd. "One of my favorite artists, and who I grew up listening to my whole life."

She continued, "Someone who's influenced my music, my style, someone who I love as a performer, and someone who constantly keeps redefining herself and music. I just absolutely love her."

Introducing Stefani to the stage, Lipa declared, "This incredible woman is here tonight. And so, L.A., you lucky f**kers, get to have the one and only, Gwen Stefani!"

After the Hollaback Girl singer joined her on stage, the pair performed No Doubt's 1995 heartbreak anthem Don't Speak together.

It appeared to be a family outing, with Stefani's two sons with ex-husband Gavin Rossdale, Kingston, 19, and Zuma, 17, spotted enjoying the performance from the audience.

The surprise duet followed another star-studded moment on Tuesday, when Lipa brought music icon Lionel Richie on stage to perform his classic 1983 hit All Night Long (All Night) with her.

As part of her Radical Optimism Tour, Lipa will perform in San Francisco on 11 and 12 October, before wrapping up the U.S. leg of the tour in Seattle on 15 and 16 October.