In between Adam Gontier and Andy Childs who's highest charting single is "Simple Life"?
Adam Gontier Adam Wade Gontier (born May 25, 1978) is a Canadian singer, songwriter and musician. He is the lead singer, rhythm guitarist and main songwriter for Saint Asonia, but is best known as the former lead singer, rhythm guitarist and main songwriter of the Canadian rock band Three Days Grace. Gontier left Three Days Grace on January 9, 2013. In addition to his work with Three Days Grace, he has been involved in collaborations with other bands including Art of Dying and Apocalyptica.
On How Life Is On How Life Is is the debut studio album by American singer and songwriter Macy Gray, released on July 1, 1999 by Epic Records. Produced by Andrew Slater, it became Gray's best-selling album to date, selling 3.2 million copies in the United States and seven million copies worldwide.