Myleene Klass and Katherine Jenkins braved the torrential Friday weather as they took to the stage to perform for a rain-soaked crowd at BST Hyde Park.
Former Hear'Say singer Myleene, 46, looked glamorous in an elegant white satin gown as she introduced performer Katherine at the music event.
She upped the glamour with dangling silver earrings, a stunning gold watch, and a sophisticated red lip.
Welsh opera star Katherine, 44, put on a jaw-dropping display in a strapless silver glittering jumpsuit with a huge matching half skirt.
The crowd was a spread of multicoloured ponchos and raincoats but they all still looked thrilled to be there.
Myleene matched the cowl-neck dress with platformed gold heels, as she eagerly introduced Katherine's performance at the festival.
After performing for the thousands that braved the elements for her show, Katherine wrote on Instagram: 'Singing in the rain at ☔️ Thank you to the amazing crowd for braving the wet'.
The main headliner at American Express presents BST Hyde Park on Friday was Italian tenor Andrea Bocelli.
Myleene was the host, and she wrote on ticket before BST began: 'A few seats left if you fancy seeing the biggest outdoor classical concert this century!'
Also performing over the next two weeks are Kings Of Leon, Robbie Williams, and Shania Twain, who rocked the Glastonbury legends slot on Sunday.
They will be joined by Stevie Nicks, Robbie Williams, Kylie Minogue, and Sza, who headlined Glastonbury on Sunday.
The main headliner at BST Hyde Park on Friday was Italian tenor Andrea Bocelli, widely considered to be one of the best male opera singer of all time.
Andrea has won three Grammy Awards and half of all his music nominations. Celine Dion once said of him: 'If God would have a singing voice, he must sound a lot like Andrea Bocelli.'
The international superstar will be joined by UK's most in-demand orchestra The Royal Philharmonic Orchestra, conducted by talented Michele Spotti.
The conductor has been Musical Director of Marseille's Opera House and Philharmonic Orchestra since 2023.
Compered by Myleene, the incredible festival day will also saw performances by the likes of Nadine Sierra, Isabel Leonard, Luca Micheletti as well as a choir by Crouch End Festival Chorus.
He brings together some of the most talented opera performs, who will be gracing Hyde Park's stage.
BST Hyde Park attendees included American actors and husband and wife duo Ashton Kutcher and Mila Kunis.
