Nicole Scherzinger, Carmit Bachar, Kimberley Wyatt, Ashley Roberts, and Jessica Sutta performed together for the first time in 10 years on the British talent show, and the group spoke with Britain's Daily Mail newspaper shortly after the "amazing" performance.
Frontwoman Nicole, who is also a judge on the popular show, said, "It was so great to be back together again. The energy from the crowd was amazing and spurred us on."
"This is just the beginning of what we have in store for everyone!" she promised.
The group performed a high-energy medley of some of their biggest hits, including "Buttons", "When I Grow Up", and "Don't Cha", before ending with the new track - their first in 10 years.
Sitting out of the reunion is Melody Thornton, with group founder Robin Antin telling Britain's The Sun newspaper "at this time, it wasn't right" for Melody to reunite with the girls - as they head out on a U.K. arena tour in 2020 with tickets dropping on Monday