I Don't Know (Mika Nakashima song)
| "I Don't Know" | |
|---|---|
| Song | |
| A-side | "I Don't Know" |
| B-side | "Shut Up" |
"I Don't Know" is Mika Nakashima's 26th single, released on July 23, 2008. It is a collaboration with owarai group Morisanchuu (森三中), released under the name Mica 3 Chu (Mikasanchuu), and is her first single to be released as a CD+DVD format in addition to the regular CD only format.
'I Don't Know' is Mika's first English-language single. 'I Don't Know' and its B-side, 'Shut Up,' are sung entirely in English.
Track listing
All lyrics are written by Mika Nakashima & Lori Fine; all music is composed by Lori Fine, arranged by Coldfeet
| No. | Title | Length |
|---|---|---|
| 1. | "I Don't Know" | |
| 2. | "Shut Up" | |
| 3. | "I Don't Know" (Instrumental) | |
| 4. | "Shut Up" (Instrumental) |
Charts
Oricon sales chart (Japan)
| Release | Chart | Peak Position | Sales Total | Chart Run |
|---|---|---|---|---|
| July 23, 2008 | Oricon Daily Singles Chart | 6 | 17,708 | 5 weeks |
| Oricon Weekly Singles Chart | 11 | |||
| Oricon Monthly Singles Chart | — | |||
| Oricon Yearly Singles Chart | 392 |