Record producer who worked with AC/DC, City Boy, Def Leppard, The Cars, Bryan Adams, Maroon 5, Nickelback, and many other artists.
He had his own band in high school in South Africa where he grew up. He played rhythm guitar and sang harmonies.
He lived a secluded life in Switzerland and for years refused any press interviews.
He was married to country superstar Shania Twain from 1993 until 2010.
He produced Lady Gaga's acclaimed single You and I from 2011.