Question: Which musician is American, Roy Khan or Lou Gramm?
Related documents: [0]  [DOC] Lou Gramm (born Louis Andrew Grammatico; May 2, 1950) is an American rock singer, and songwriter, best known for being the original lead singer of the British-American rock band Foreigner. [END] 
[1]  [DOC] Roy Sætre Khantatat (born March 12, 1970), is a Norwegian singer-songwriter. Commonly known as Roy Khan or simply Khan, he was the lead vocalist for the symphonic power metal band Kamelot from 1997 to his departure in 2011. He co-wrote most of Kamelot's songs with the band's guitarist and founder Thomas Youngblood during his tenure. Prior to joining Kamelot, Khan was lead singer for the Norwegian progressive metal band Conception from 1991 until 1997 when they disbanded. [END] 
Answer: 
Lou Gramm
Lou Gramm