Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Patrick Raymond Leonard (born 1955) is an American songwriter, keyboardist and music producer, known for his longtime collaboration with Madonna on many different recordings.He gained his entry into the music business with late 1970s Chicago, Illinois-based pomp rock band Trillion, which was also notable for featuring future Toto singer Dennis "Fergie" Frederiksen on lead vocals.

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