Possible Clues:

• 'American Idol' selection
• You work best when on this number
• Colloquial pittance
• Solomon's melodious utterance?
• Vocal piece that's very new and grand
• Napster download
• "Twinkle, Twinkle Little Star" is one
• Something to sing or hum
• Track
• Is that the way your boy began to get invoiced?