Seal's icy proposal to Klum

British pop star Seal proposed to his supermodel wife Heidi Klum in an igloo.

The couple got engaged in 2005 and married a year later. They now have two children together, as well Klum's daughter Leni from a previous relationship.

Klum admits the singer went to great lengths to ensure he popped the question in the most romantic way possible - in an Igloo handbuilt in the Canadian Rockies mountain range.

She tells US magazine Marie Claire: "(He) took me by helicopter. He had an igloo built there, and they'd brought up everything: a bed with sheets inside the igloo, rose petals everywhere, candles. Very, very romantic!

"There was food and champagne, and then the helicopter left. It was a little scary, too, because you're so cut off from the world. No trees, nothing - it was hardcore. But I was ecstatic."