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Nicola Roberts has said that she has obsessive compulsive disorder (OCD) when it comes to wearing matching bras and knickers.
The Girls Aloud singer told Now that she cannot leave the house if her underwear clashes.
Roberts said: "I've got OCD about that! I can't ever, ever, ever have mismatched underwear. If I come to work and I feel like s**t, I'll be in a bad mood all day."
She added that she is still in the "early stages" of her relationship with Charlie Fennel and is not yet comfortable wearing casual clothes around him.
"I'm still all about silk sheets and Agent Provocateur underwear," she said.
Roberts has reportedly purchased a £2 million home with Fennel in Chislehurst, Kent.
