Charles Calello is an American arranger, composer, conductor, record producer, and singer born in Newark, New Jersey. Calello attended Newark Arts High School and the Manhattan School of Music, in New York City. His track record of successfully collaborating with various artists to produce or arrange Billboard hit songs led to his nickname in the industry as the "Hit Man."

Watertown is a studio album by American singer Frank Sinatra, released in March 1970 through Reprise Records. It is a concept album centered on a man from Watertown, New York. In a series of soliloquies, the nameless narrator tells his heartbreaking story of personal loss: his wife has left him and their two boys for the lure of the big city. Watertown was produced and co-written by Bob Gaudio, one of four members of the rock band the Four Seasons, with Jake Holmes also co-writing the songs. It is the only album where Sinatra ever voiced over pre-recorded orchestral tracks. The album was released to mixed critical reviews and poor sales, with it being Sinatra's only major album release not to chart in the top 100 of the Billboard 200. It has since been reevaluated and many consider it to be among his finest albums.