Robert John "Mutt" Lange is among the most iconic record producers of all-time.

AC/DC 's Highway to Hell and Back In Black , Foreigner 4 , Def Leppard 's Pyromania and Hysteria and ex-wife Shania Twain's early catalog are just a random sampling of his multi-platinum golden touch.

But for the past 10 years the South African-born Lange has been more than merely scarce -- unless you're Bryan Adams .

The two have a long history; Lange was behind the board for Adams' 1991 album Waking Up the Neighbors and 1996's 18 til I Die , and they won a Grammy Award in 1991 for "(Everything I Do) I Do It For You" from the film Robin Hood: Prince of Thieves , which Lange co-wrote with Adams and Michael Kamen, and produced.

He also handled some tracks for Adams' So Far So Good in

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