Pop princess Kylie Minogue dazzled the Prince of Wales and the Duchess of Cornwall at a St James's Palace reception to mark their Diamond Jubilee tour, which begins next month.
Kylie performed On A Night Like This, I Believe In You and Locomotion for the 200 guests at the surprise concert.
Speaking before leaving, she said: "It's been such a brilliant year to be in my home, the UK, and so to send the royals off on this trip it felt fitting to be part of the farewell for them."
Famous faces and dignitaries from the three nations the royal couple will be visiting - Papua New Guinea, Australia and New Zealand - were invited to the event.
Among the guests were comic Barry Humphries, soprano Dame Kiri Te Kanawa, broadcaster and musician Rolf Harris, and former New Zealand rugby captain Sean Fitzpatrick.