Possible Clues:

• "So why on Earth should ___" ("A Hard Day's Night" lyric)
• "So why on earth should ___?" (line from "A Hard Day's Night")
• 'So why on earth should ___' ('A Hard Day's Night')
• "So why on earth should ___" ("A Hard Day's Night")
• "So why on earth should ___ ..." (line from "A Hard Day's Night")