Question: What do Constantine Maroulis and Feargal Sharkey have in common? 
Related documents: [0]  [DOC] Seán Feargal Sharkey (born 13 August 1958) is a singer from Northern Ireland most widely known as the lead vocalist of pop punk band The Undertones in the 1970s and 1980s, and also for solo works in the 1980s and 1990s. His 1985 solo single "A Good Heart" was an international success. After becoming less musically active in the early 1990s, he has performed various roles supporting the UK's commercial music industry, winning several awards and honours for his work in that area. [END] 
[1]  [DOC] Constantine James Maroulis ( ; born September 17, 1975) is a Greek-American actor and rock singer from Wyckoff, New Jersey. He was the sixth-place finalist on the fourth season of the reality television series "American Idol", and received a nomination for the Tony Award for Best Performance by a Leading Actor in a Musical for his role in "Rock of Ages". He starred in the title role in "Jekyll and Hyde" on Broadway, for which he received a Drama League Award Nomination for a Distinguished Performance Award. [END] 
Answer: 
singer
singer