Question: Which musician is American, Roy Khan or Lou Gramm?

Context paragraphs:
Bobby Messano: Bobby Messano (b. June 23, 1954 ) is an American artist, guitarist and musician.  He has recorded and toured with STARZ, Lou Gramm, Steve Winwood, Clarence Clemons, Franke and the Knockouts, and Peter Criss.

Midnight Blue (Lou Gramm song): "Midnight Blue" is the first single released by Lou Gramm from his debut solo album "Ready or Not" in 1987.  The single spent five weeks at number one on the "Billboard" Hot Album Rock Tracks, starting on February 14, 1987, and peaked at number five on the "Billboard" Hot 100, Gramm's highest-charting solo hit.

Luanne: "Luanne" was the fifth and final single taken from the album "4" by the band Foreigner, and the second to feature a B-side that was not available on one of their albums, a controversial live version of their hit, "Hot Blooded".  The song was written by Lou Gramm & Mick Jones and reached number 75 in the U.S. charts (meager, considering the band's other successful singles) where the album, "4" had already gone to number 1, eventually selling more than six-times platinum, but was a live staple for years to come.  The live version of "Hot Blooded" was later placed on the international release of their retrospective, "Records", but in subsequent re-releases has been dropped in favour of the original album version due to a couple of choice words spoken in ad lib during the song's performance by its singer, Lou Gramm.

Shadow King (band): Shadow King was a hard rock supergroup.  Formed by former Foreigner lead singer Lou Gramm, former Sweet Savage, Dio, Whitesnake, Riverdogs, (currently Def Leppard) guitarist Vivian Campbell, Lou Gramm's former Black Sheep and then future Foreigner bandmate bass player Bruce Turgon, and drummer Kevin Valentine.

Lou Gramm: 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.

Foreigner (band): Foreigner is a British-American rock band, originally formed in New York City in 1976 by veteran English musician Mick Jones and fellow Briton and ex-King Crimson member Ian McDonald along with American vocalist Lou Gramm.

Roy Khan: 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.

Dirty White Boy (song): "Dirty White Boy" is a song recorded by British-American rock band Foreigner, written by Lou Gramm, Mick Jones, and produced by Roy Thomas Baker, Jones, and Ian McDonald.  It was the first single taken from the band's third studio album, "Head Games" (1979).  The B-side, "Rev On The Red Line" has also proven to be very popular among fans, but was never released as an A-side single on its own.  Lou Gramm's trademark scream at the end of the song is missing from this abbreviated version of "Dirty White Boy".  Jones has claimed that the song was about Elvis Presley, adding that "he always was that dirty white boy who changed the shape of music completely.  It was talking about the kind of heritage that he left, and I think that had an effect on all the musicians that came after, like Mick Jagger - he was also a dirty white boy.  Elvis paved the way for all that."

Black Sheep (rock band): Black Sheep, a Rochester, New York-based 1970s United States rock music band, was one of vocalist Lou Gramm's early working bands (it followed Poor Heart, which broke up c. 1970).  The group, which had released the single "Stick Around" in 1974, the album "Black Sheep" in 1975, and the album "Encouraging Words" in late 1975, was no longer performing when Gramm was invited by Mick Jones to join the band Foreigner in 1976.

That Was Yesterday (Foreigner song): "That Was Yesterday" was the second single taken from the album "Agent Provocateur" by the band Foreigner.  This song was available in four versions, as a remixed single, a very popular extended remix, an orchestral version, and the original mix.  The song was written by Lou Gramm and Mick Jones, and the B-side "Two Different Worlds" is also of note for being the first solo-written Lou Gramm song to appear on a single.  The single reached number 12 on the "Billboard" Hot 100 chart, and also reached #4 on the Billboard Mainstream Rock chart and #24 on the Adult Contemporary chart.  It also reached the Top 40 in the UK (#28), the Netherlands (#19), Switzerland (#29) and Germany (#31).

Supporting paragraphs: Roy Khan Lou Gramm
Answer: Lou Gramm