Former Spice Girls Geri Horner, Emma Bunton and Melanie B, known collectively as GEM, have recorded a new single titled Song For Her.
The track was leaked online on Wednesday and Chisholm has given it her seal of approval.
“It sounds really catchy, especially that chorus, and it’s lovely to hear those voices,” she said.
The former Sporty Spice opted not to join her former bandmates for the reunion, meant to celebrate the band’s 20th anniversary.
“Personally it was right for me not to take part at this time,” she said.