[related]Rita said: "We actually did four songs together. We didn't plan it. It's not like a Cher and Sonny situation.

"We were both kind of talking about music and we just happened to hum together and a song came out, and we ended up doing four tracks on the record."

She added: "It's probably the best decision I made working with him."

Calvin has also written and produced Rita's new single I Will Never Let You Down, which topped the Vodafone Big Top 40 countdown over the weekend.