The 33-year-old star gave birth to her second daughter Hero in March and recently attended the Nordoff Robbins Silver Clef awards, where she wore a black polka dot and leopard print dress.
Speaking to UK newspaper Daily Express about the dress, she said: 'I'm not back in my pre-baby wardrobe yet and I'm not splashing out lots on new clothes when I'm between sizes.
'I begged my manager to loan me this dress. I was with her when she bought it. I remembered she had it and thought, it fits, I like it, I can wear it to the awards.'