With a hit-single track record spanning four decades, Burt Bacharach became one of the most important composers of popular music in the 20th century, almost equal to such classic tunesmiths as George Gershwin or Irving Berlin. His sophisticated yet breezy productions borrowed from cool jazz, soul, Brazilian bossa nova, and traditional pop to virtually define and undoubtedly transcend the staid forms of Brill Building adult pop during the 1960s.