During an appearance on Sunday Brunch, blonde Mollie revealed that she and Vanessa would be travelling to the States soon without their bandmates Una Healy, Rochelle Humes and Frankie Sandford.
"Nessa and I are both going out there for about a month in about a week's time, then we'll come back, straight into tour rehearsals for a month, then the tour straight away," said Mollie.
"A little bit of a break then we're straight back."
Mollie didn't reveal what she and Vanessa would be doing in America, although Rochelle joked: "You can tell the ones who don't have kids!"
Rochelle is mum to daughter Alaia-Mai, born May 2013, while Frankie gave birth to son Parker in October 2013 and Una has two-year-old daughter Aoife Belle.
Mollie and Vanessa will be back in time to join their bandmates at rehearsals for The Saturdays' upcoming Greatest Hits Tour, which kicks off in September.
The girls announced the tour and an accompanying Greatest Hits album last week, but insisted it didn't mean they were splitting.
Instead, they've said the Greatest Hits compilation is to recognise their seven years together and 17 hit singles. The album will include their classics and three brand new tracks.
As well as gearing up for the tour and album, the group are also promoting new single 'Not Giving Up', which is the fifth track to be taken from their last studio album, Living For The Weekend.
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Watch The Saturdays' video for 'Not Giving Up' below: