12" Maxi-single (Wydany 26 listopada 2009) "I Need You Now" [Grant Nelson Mix] — 8:00 "I Need You Now" [Grant Nelson Dub Mix] — 7:30 "I Need You Now" [Cahill Mix] — 6:00 "I Need You Now" [Ali Payami Mix] — 6:00
Digital download (Wydany 23 listopada 2009) "I Need You Now" [Radio Edit] — 3:45
Digital download (Wydany 25 grudnia 2009) "I Need You Now" [Cahill Radio Edit] — 3:15
Digital download – remix (Wydany 12 lutego 2010) "I Need You Now" [Cahill Extended Mix] — 6.20 "I Need You Now" [Ali Payami Mix] — 5:54 "I Need You Now" [Ali Payami 909 Mix] — "I Need You Now" [Alex K Mix] — "I Need You Now" [Grant Nelson Mix] — 8:00 "I Need You Now" [Jens Kindervater Mix] — 5:19 "I Need You Now" [Wersja albumowa] — 3:07 "I Need You Now" [Extended Mix] — 4:35
Singel CD goodmusic.it (Wydany 2010) "I Need You Now" [UK Radio Edit] — 3:07 "I Need You Now" [Extended Mix] — 4:35 "I Need You Now" [Grant Nelson Mix] — 8:00 "I Need You Now" [Cahill Club Mix] — 6.20 "I Need You Now" [Ali Payami Mix] — 5:54 "I Need You Now" [Jens Kindervater Mix] — 5:19 "On and On" [Radio Edit] — 3:51 "On and On" [Extended Version] — 5:47 "On and On" [Alex Colle Radio Edit Remix] — "On and On" [Alex Colle Remix] —