Who was that singer at the end of the Victoria's Secret Fashion Show? (Dec. 4)?

I caught the last few minutes of it and i really liked that song that they guy was singing but i dont know his name or what the name of the song was....if you know that'd be great

it's seal, he was singing "amazing"

seal which is Heidi klums husband

Seal, he is Heidi Klum's husband. He performed another song too, with her.