Heidi Klum has insisted that she was completely faithful to Seal during their seven-year marriage.

Kiss From A Rose singer Seal had to issue a statement after he suggested his estranged wife allegedly slept with her bodyguard Martin Kristen after they were photographed together in Italy, which the German supermodel has already denied.

In a new interview airing this week, the 39-year-old told US presenter Katie Couric on her new show Katie that she "has never looked at another man", reported New York Post's Page Six.

"It was a unique choice of words. I'm used to it. Other people aren't. When we were together, I never looked at another man," she said.

Heidi was apparently "devastated" after British crooner Seal told TMZ.com: "I preferred Heidi would have showed a little bit more class and at least waited until we separated first before deciding to fornicate with the help," according to sources.

The 49-year-old's representative later issued a statement to People, explaining that the singer wanted to clarify his words.

The statement said: "Seal would like to clarify that he was not implying his wife was cheating on him while they were together. But rather he was pointing out that they are separated and the divorce is not final so they are legally still married."

Seal and Heidi - who have four children together including Heidi's daughter from a previous relationship - split in January.

They blamed the break-up on "growing apart", and appealed for privacy, stressing that the split was "amicable".