| Official |
|---|
| 1.1 | Now It's On | 4:09 | Grandaddy | Now It's On | |
| 1.1 | Now It's On | 4:09 | Grandaddy | Sumday | |
| 1.1 | Now It’s On | 4:09 | Grandaddy | Sumday | |
| 1.1 | Now It's On | 4:09 | Grandaddy | Sumday | |
| 1.1 | Now It’s On | 4:08 | Grandaddy | Sumday | - 2003-06-10 CA
- 2003-06-10 GB
- 2003-06-10 US
|
| 1.1 | Now It’s On | 4:08 | Grandaddy | Sumday | |
| 1.1 | Now It’s On | 4:09 | Grandaddy | Sumday | |
| 1.1 | Now It's On | 4:09 | Grandaddy | Sumday | |
| 1.6 | Now It's On | 4:09 | Grandaddy | All Songs Considered 4 | |
| 1.2 | Now It’s On | 4:07 | Grandaddy | B*ll*cks to Cancer | |
| Promotion |
|---|
| 1.3 | Now It’s On | 4:08 | Grandaddy | Bang on Target, Volume 1 | |
| 1.2 | Now It’s On | 4:08 | Grandaddy | Metro Life Summer Festival | |
| 1.2 | Now It’s On | 4:05 | Grandaddy | Sampler | |
| 1.1 | Now It's On | 4:05 | Grandaddy | Tour Sampler 2003 | |
| 1.6 | Now It's On | 4:07 | Grandaddy | V2 Finest Pop Selection | |
| 1.6 | Now It's On | 4:10 | Grandaddy | Urban Outfitters Sampler #10 | |
| 1.1 | Now It's On | 4:07 | Grandaddy | Virgin Recommends, Volume 10 | |
| (unknown) |
|---|
| 1.4 | Now It's On | 4:10 | Grandaddy | Le V2 Rock Summer 2003 | |
