| Album Title | Release date | us | uk | aus | bra | ger | can | ita | esp | fra |
|---|---|---|---|---|---|---|---|---|---|---|
| 8 Letters | 2 | 6 | 4 | 9 | 15 | 2 | 5 | 5 | 21 | |
| A Why Don't We Christmas - EP | 5 | 15 | 7 | 70 | 2 | |||||
| Invitation - EP | 1 | 7 | 5 | 46 | 1 | 40 | 56 | |||
| Only the Beginning - EP | 25 Nov 16 | 62 | 77 | 74 | ||||||
| Something Different - EP | 19 | 64 | 29 | 75 | ||||||
| The Good Times and The Bad Ones | 2 | 1 | 1 | 2 | 4 | 1 | 4 | 3 | 38 | |
| Why Don't We Just - EP | 18 | 64 | 51 | 24 |
| Song Title | Release date | us | uk | aus | bra | ger | can | ita | esp | fra |
|---|---|---|---|---|---|---|---|---|---|---|
| 8 Letters | 62 | 65 | 95 | |||||||
| 8 Letters (Acoustic) | 71 | 92 | ||||||||
| Big Plans | 1 | 10 | 13 | 36 | 1 | 27 | ||||
| Chills | 2 | 8 | 13 | 16 | 75 | 11 | ||||
| Cold in LA | 3 | 25 | 26 | 3 | 25 | |||||
| Come To Brazil | 10 | 27 | 21 | 41 | 69 | 9 | 96 | |||
| Don't Change | 5 | 31 | 37 | 92 | 10 | |||||
| Fallin’ (Adrenaline) | 30 | 18 | 66 | |||||||
| Fallin' | 1 | 7 | 4 | 12 | 47 | 1 | 56 | 50 | 58 | |
| Hooked | 4 | 27 | 27 | 52 | 91 | 4 | 77 | |||
| How Do You Love Somebody | 41 | 73 | 19 | 23 | ||||||
| I Still Do | 9 | 33 | 20 | 97 | 9 | |||||
| Just Friends | 64 | 67 | 29 | |||||||
| Let Me Down Easy (Lie) | 44 | 93 | 34 | 31 | ||||||
| Lotus Inn | 52 | 55 | 47 | |||||||
| Love Back | 5 | 19 | 12 | 6 | 75 | 7 | ||||
| Mad At You | 6 | 28 | 34 | 36 | 94 | 9 | ||||
| Slow Down | 97 | 92 | 70 | |||||||
| Talk | 1 | 37 | 26 | 66 | 5 | 91 | ||||
| These Girls | 18 | 40 | 53 | 23 | ||||||
| Trust Fund Baby | 5 | 35 | 34 | 9 | ||||||
| Trust Fund Baby (Acoustic) | 88 | 87 | ||||||||
| Unbelievable | 4 | 32 | 38 | 5 | ||||||
| What Am I | 3 | 18 | 16 | 40 | 6 | 63 | ||||
| What Am I (Live and Unplugged Session) | 60 | 89 | ||||||||
| With You This Christmas | 12 | 39 | 52 | 16 |