He contributed backing vocals to the songs "Numb", "Get On Your Boots", "Moment of Surrender", "Elevation", "Miracle Drug", "Love and Peace or Else", "Unknown Caller", "Zoo Station" and "Daddy's Gonna Pay for Your Crashed Car" (only during Zoo TV Tour), and others.
הוא תרם קולות רקע לשירים "Numb", "Get On Your Boots", "Moment of Surrender", "Elevation", "Miracle Drug", "Love and Peace or Else", "Unknown Caller", "Zoo Station" ,"Daddy's Gonna Pay for Your Crashed Car" (רק במהלך סיבוב ההופעות של Zoo TV) ובעוד כמה שירים אחרים.