Nicola Roberts has shared a series of behind-the-scenes photos from Girls Aloud 's Sound of the Underground music video to celebrate the anniversary of its chart success.
The singer-songwriter, 37, took to Instagram earlier to mark the 20th anniversary of the song topping the charts – which came after the group had formed on Popstars: The Rivals.
The debut single by the group – which also consisted of Cheryl, now 39, Nadine Coyle, now 37, Kimberley Walsh, now 41, and the late Sarah Harding – was released in 2002.
