I listened to Rod Argent's Moving Home a couple days ago and noticed a small feature in "I'm in the Mood." In the lines "You know I feel so good, / Feel so good!" the second "good" is sung with a melisma for a sense of degree (for "so").
Argent mentions Duke Ellington in the lyrics, and I think the title "I'm in the Mood" might be a subtle reference to "Mood Indigo," one of Ellington's songs. For what it's worth, Argent also mentions Ellington in this radio piece from 2009.
