Complex sentence: Her 2004 release, "Hummin'to Myself", was Ronstadt's fourth album of traditional jazz music standards and her final recording, 2006's "Adieu False Heart", mixed Cajun music with rock.
Split into simpler sentences: Her 2004 release, "Hummin'to Myself", was Ronstadt's fourth album of traditional jazz standards. In 2006 she made her final solo recording to produce "Adieu False Heart", mixing Cajun music with rock.