Passage: Nicholson was born on April 22, 1937, in Neptune City, New Jersey, the son of a showgirl, June Frances Nicholson (stage name June Nilson). Nicholson's mother was of Irish, English, and German descent. She married Italian-American showman Donald Furcillo (stage name Donald Rose) in 1936, before realizing that he was already married. Biographer Patrick McGilligan stated in his book Jack's Life that Latvian-born Eddie King (originally Edgar A. Kirschfeld), June's manager, may have been Nicholson's biological father, rather than Furcillo. Other sources suggest June Nicholson was unsure of who the father was. As June was only seventeen years old and unmarried, her parents agreed to raise Nicholson as their own child without revealing his true parentage, and June would act as his sister.In 1974, Time magazine researchers learned, and informed Nicholson, that his "sister", June, was actually his mother, and his other "sister", Lorraine, was really his aunt. By this time, both his mother and grandmother had died (in 1963 and 1970, respectively). On finding out, Nicholson said it was "a pretty dramatic event, but it wasn't what I'd call traumatizing ... I was pretty well psychologically formed".Nicholson grew up in Neptune City, New Jersey. He was raised in his mother's Roman Catholic religion. Before starting high school, his family moved to an apartment in Spring Lake, New Jersey. "When Jack was ready for high school, the family moved once more—this time two miles (three kilometers) farther south to old-money Spring Lake, New Jersey's so-called Irish Riviera, where Ethel May set up her beauty parlor in a rambling duplex at 505 Mercer Avenue." "Nick", as he was known to his high school friends, attended nearby Manasquan High School, where he was voted "Class Clown" by the Class of 1954. He was in detention every day for a whole school year. A theatre and a drama award at the school are named in his honor. In 2004, Nicholson attended his 50-year high school reunion accompanied by his aunt Lorraine.

Question: What did Nicholson's mother do for a living?
showgirl