To mark the launch of Jeans For Genes Day 2013, the mother-of-one wore denim jeans with a cute black and white silk camisole to the star-studded party at Jewel Bar on Tuesday night (3 September).
We reckon she looked fab but according to Imogen, she decided her top was too low-cut and she ended up covering herself in a jumper when she got inside.
She joked on Twitter: "Had fun at the @JeansforGenes event. Felt like my top was too low cut so ended up wearing a jumper! #notlikeme."
Imogen attended the event without boyfriend Adam Horsley, but it seems the couple are as loved up as always as Imogen tweeted on 2 September that Adam had brought her home a gorgeous bunch of flowers.
"My day is getting better! The bf is the sweetest #flowers #colours #celebrating #excited #happy."
Model Imogen and city worker Adam became first time parents to gorgeous baby daughter Ariana Siena in February.
Other stars at yesterday's party included Jessica Wright, Lauren Goodger, Kimberley Garner, Luisa Zissman and Abigail Clarke.
Jeans For Genes Day, which takes place 20 September, raises money for Genetic Disorders UK and aims to change the world for children with genetic disorders.
Check out all the stars at the Jeans For Genes Day 2013 launch:
Copyright: WENN James Shaw