Sarah Harding
The girl group went deep into the vault for their latest charity single.
The group made sure to celebrate their late bandmate as they took their final bows.
"She would love that we were doing this."
"It will never feel like the old Girls Aloud again but we’ve reached a point where we feel ready to celebrate all of it. Sarah included."
Nicola Roberts' cryptic Instagram post has got fans' imaginations running wild.
The excitement is bittersweet following the death of Sarah Harding in 2021.
Girls Aloud singer Sarah died in 2021 aged just 39, following a breast cancer diagnosis.
Kimberley Walsh, Nadine Coyle, Nicola Roberts and Cheryl Tweedy hosted The Primrose Ball to raise money in Sarah's memory.
Cheryl, Nadine, Nicola and Kimberley took part in a 5km run to raise money in memory of their former bandmate who died of cancer last year.
Nadine, Nicola, Cheryl and Kimberley have "a number of exciting fundraising activities planned for 2022".