The Saturdays think their children should form a band to act as the group's pension.

The 'What About Us' hitmakers would love it if their kids - Una Healy's 14-month-old daughter Aoife Belle and Rochelle Wiseman's six-week-old daughter Alaia-Mai - follow in their footsteps and become a pop group called The Little Saturdays.

Mollie King said: ''If they are all girls then maybe they could form a girl band.''

Frankie Sandford - who is pregnant - joked: ''I always say it's like our pension, The Little Saturdays. But it's up to them whether they want to become pop stars. The choice was up to us so it should be the same.''

The Saturdays were without Rochelle when they performed at the Capital FM Summertime Ball at London's Wembley Stadium on Sunday (09.06.13), and the remaining members - completed by Vanessa White - wanted her husband and JLS singer Marvin Humes to step in for the brunette beauty.

Speaking to BANG Showbiz at the event, Frankie added: ''They look so alike we genuinely think we could get away with having Marvin as our fifth member.''

Mollie said: ''We were like, 'You know all the dance moves and you know her harmonies, so jump in.''