The model was among the stars who headed to the Soho Sanctum Hotel in London on Monday evening (14 September) for the debut of Nikki's new JYY range.
Imogen looked fab in her chic black outfit, which she teamed with glossy curls and minimal make-up for a very sophisticated look.
She met Nikki on the seventh series of Big Brother back in 2006 and have stayed friends ever since. Other notable housemates from that series include Nikki's ex Pete Bennett, Aisleyne Horgan-Wallace and Grace Adams-Short.
Since appearing on Big Brother, model Imogen has settled down with city trader Adam Horsley. They have an adorable daughter Ariana Siena, born in February 2013, and their second child is on the way.
Meanwhile, Nikki's range with JYY.London is designed for petites. She recently told us: "I really like their style! They asked me if I'd like to wear some of their things and the sizes that they sent me fitted me perfectly - I struggle with sizing. I love the range and every time I wore something from it, people would comment and say how nice it was so I got inspired by it."
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