Lambs, assemble — Mariah Carey is coming back to Europe next summer, and she is bringing the ultimate ’90s nostalgia with her.

Carey announced her “Firefly” tour on Monday morning, Nov. 9, 2026, via her Instagram, telling fans: “Lambs!! Join me next summer on the Firefly tour!!”

The run features nine shows in six countries, from June 24 to July 20, 2027. It kicks off June 24 at Mølleparken in Sønderborg, Denmark, before heading to the UK for four dates: June 27 at Powderham Castle in Exeter, June 29 at Cardiff Castle, July 1 at Blenheim Palace and July 3 at Scarborough Open Air Theatre.

From there, the tour continues to Stuttgart, the Lucca Summer Festival on July 11 and Spa, Belgium, on July 14, before closing July 20 at the Moon & Stars Festival in Locarno, Switzerland.

And the support acts are a throwback dream: Sugababes and Eternal will join Carey at Powderham Castle, with Eternal supporting on the other UK dates, too. If you grew up on ’90s girl groups, this is your summer sorted.

Tickets go on general sale Friday, Nov. 13, at 9am local time, with a UK pre-sale from Nov. 12.

Before Europe, Carey plays three sold-out UK Christmas arena shows — in Birmingham, London and Manchester — starting Nov. 27.

Read more at Clash Magazine and Pollstar.

Photo: Mariah Carey performing at the SM Mall of Asia Arena in Pasay, Philippines, on October 14, 2025. Photo by Patrick Cristiano, via Wikimedia Commons (CC BY-SA 4.0).