Music
The pair, who are promoting their new album Wordshaker, were temporarily injured during the appearance at HMV in the city's Trafford Centre.
According to reports, White and Healy didn't realise how close they were to each other and collided while taking a seat behind the desk.
The two grabbed their heads in pain after the incident but quickly regained their composure and continued with the signing.
Last month, star Rochelle Wiseman was forced to gaffa tape her breasts before a show when she realised that her dress was too big for her.
> Click here to read our recent interview with The Saturdays
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