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The Capital Late Show with Marvin Humes 10pm - 1am
Find out which of the girls got a bit too friendly with her 'All Fired Up' bandmate.
The Saturdays told Capitalfm.com about one night when there was more than just sisterly love in the band.
Una put her hand up in our chat with the band and admitted to trying to snog Vanessa on a night out, which Vanessa remembers more clearly.
"Yeah Una tried to one night," Vanessa revealed.
"She was a bit drunk and she really tried to, and there were all these paps outside and she's going, 'I just love you so much, come here, come here'.
"And I'm thinking, right she's definitely trying to kiss me in front of all these paps."
"She missed out, she definitely missed out," Una added.
And then Rochelle revealed photos to us of what appears to be Frankie and Mollie sharing a snog, but all is not as it seems.
"The reason Roch took the picture of Frankie and I is because we were both like, 'I wonder what we look like when we're going in for the kiss'," Mollie explained.
"You know when you go in to kiss your boyfriend you will never know what you look like," Frankie added.
"And Mollie said, 'I wonder what you look like when you go to kiss Wayne?' I don't know why she was thinking that, but we thought we'd give it a go!"
The Saturdays take over Capitalfm.com for Wednesday 7th September. The new single 'All Fired Up' is out now and you can watch the video here.