| Title, Format | Label | Cat# | Country | Year | |
|---|---|---|---|---|---|
| Crazy (CD, Single) | Warner Music UK Ltd. | 5051011-3742-5-8 | Europe | 2006 | |
| Crazy (10", S/Sided, Ltd, Col) | Not On Label | CRAZY-1A | US | 2005 | |
| Crazy (Remixes) (CD, Promo) | Warner Bros. Records | 43340-0 | US | 2006 | |
| Crazy (10", S/Sided, Promo) | Warner Music UK Ltd. | SAM01118 | UK | 2006 | |
| Crazy (12") | Downtown Music | DWT 70002 | US | 2006 | |
| Crazy (12", Promo) | Downtown Music | PR 302155 | US | 2006 | |
| Crazy (12", S/Sided, Etch) | Warner Music UK Ltd. | WEA401T | UK | 2006 | |
| Crazy (7", Pic, Ltd) | Warner Music UK Ltd. | WEA401 | UK | 2006 | |
| Crazy (CD, Maxi) | Warner Music (Australia) | 5101-14328-2 | Australia | 2006 | |
| Crazy (CD, Single) | Warner Music UK Ltd. | WEA401CD | UK & Europe | 2006 | |
| Crazy (CD, Single, Promo) | Warner Music UK Ltd. | PRO 15794 | UK | 2006 |
referencing Crazy, 12", Promo, PR 302155