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| Genre: | Rock, Pop |
| Style: | Power Pop, Pop Rock |
| Format: | CD (Single) |
| 1 | Smile » Drums, Guitar, Bass: Shellback » Engineer: Michael Ilbert » Engineer [For Mix, Assistant]: Tim Roberts » Engineer [For Mix]: John Hanes » Keyboards: Max Martin » Mixed By: Serban Ghenea | 3:29 |
| 2 | What The Hell (Bimbo Jones Remix) » Remix, Producer [Additional Production], Keyboards: Bimbo Jones, Lee Dagger, Marc Jackson Burrows | 4:10 |
| Label: | Sony Music Japan SDCI-81155 |
| Genre: | Rock, Pop |
| Style: | Power Pop, Pop Rock |
| Format: | CDr (Maxi-Single , Promo) |
| 1 | Smile | 3:29 |
| 2 | Smile | 3:29 |
| 3 | Smile | 3:29 |