The 28-year-old Girls Aloud beauty – who has been in a relationship with former singer Justin Scott for six years – insists there is nothing sensational or dramatic about her "healthy" personal life.
She said: "I'm a one-guy girl and I've never played the field. I've only had one previous boyfriend. I've just had two good, healthy relationships in my life."
The 'Biology' singer also admitted she is confident about tying the knot with Justin some time in the near future.
She explained in an interview with the new issue of Reveal magazine: "I caught the bouquet at my sister's wedding last weekend, so maybe we'll wed soon. We've been together seven years, we know it will happen eventually."
Despite their closeness, Kimberley admitted she is rarely seen in public with Justin because she got so infuriated with the way he was treated by other people.
She said: "People can be so rude, he can be standing right beside me but some people don't even acknowledge he's there. Justin's all right about it – but I'm not. So I go to things on my own now."