The Saturdays star, who gave birth to daughter Alaia-Mai in May 2013, looked gorgeous as she left the central London building on Monday morning (7 October).
Rochelle teamed her baby pink skirt (from Topshop) with a simple black T-shirt, nude sandals and a very cool statement flower necklace.
The mother-of-one shared an image of her outfit with fans via Instagram, adding a pink ribbon emoticon, suggesting she chose pink to recognise Breast Cancer Awareness Month.
She wrote: "Nothing like a bit of Pink PVC to start the day haha."
Her outfit went down well with fans who inundated her with compliments via Instagram. Nearly five thousand have liked the image so far!
Rochelle and The Saturdays were on Daybreak this morning to perform new single 'Disco Love', which was released today. It's the third track to be taken from their forthcoming album Living For The Weekend, which is available from 14 October.
While pregnant Frankie Sandford remains on maternity leave ahead of the birth of her first child, fellow Saturdays Una Healy, Vanessa White and Mollie King looked as stylish as ever when they were snapped leaving ITV.
And for Mollie it wasn't all work – she got to hang out with X Factor finalist Sam Bailey, who was also appearing on ITV this morning!
Watch The Saturdays' video for 'Disco Love' below: