Back Up

《Back Up》是許志安的個人音樂專輯，於2004年10月29日推出。此專輯的包裝為立體封面，同步還發行了SACD。

曲目
{{tracklist
| headline = CD
| total_length = 42:33
| title_width = 16%

| title1 = Sign of The Time
| music1 =
| lyrics1 =
| arranger1 =
| producer1 =
| longnote1 = 過渡音樂
| length1 = 0:40

| title2 = 與神對話
| note2 = Featuring 鄭融
| music2 = 陶山
| lyrics2 = 林夕
| arranger2 = 舒文
| producer2 = 舒文
| longnote2 =
| length2 = 4:08

| title3 = Channels Surfing
| music3 =
| lyrics3 =
| arranger3 =
| producer3 =
| longnote3 = 過渡音樂
| length3 = 0:19

| title4 = 失眠都要睡
| music4 = 側田
| lyrics4 = 方-{杰}-
| arranger4 = 側田
| producer4 = 雷頌德
| longnote4 =
| length4 = 3:46

| title5 = 折磨
| music5 = 陳輝陽
| lyrics5 = 林夕
| arranger5 = 陳輝陽
| producer5 = 陳輝陽
| longnote5 =
| length5 = 3:18

| title6 = 美中不足
| music6 = 雷頌德
| lyrics6 = 黃偉文
| arranger6 = 雷頌德
| producer6 = 雷頌德
| note6 = Featuring 葉德嫻
| longnote6 =
| length6 = 3:49

| title7 = Walk of Life
| music7 =
| lyrics7 =
| arranger7 =
| producer7 =
| longnote7 = 過渡音樂
| length7 = 0:24

| title8 = 學行
| music8 = 雷頌德
| lyrics8 = 黃偉文
| arranger8 = 雷頌德
| producer8 = 雷頌德
| longnote8 =
| length8 = 2:25

| title9 = Saturday Night
| music9 = 黃貫中
| lyrics9 = 林若寧
| arranger9 = Polar Bear
| producer9 = 黃貫中
| longnote9 =
| length9 = 3:44

| title10 = 愛我所愛
| music10 = 沈志煒
| lyrics10 = 林夕
| arranger10 = 舒文
| producer10 = 舒文
| longnote10 =
| length10 = 4:11

| title11 = Round & Round Music Box
| music11 =
| lyrics11 =
| arranger11 =
| producer11 =
| longnote11 = 過渡音樂
| length11 = 0:17

| title12 = 我兒
| music12 = Vincent Chow
| lyrics12 = 黃偉文
| arranger12 = Adrian Chan
| producer12 = 舒文
| longnote12 =
| length12 = 3:56

| title13 = Channels Surfing 2
| music13 =
| lyrics13 =
| arranger13 =
| producer13 =
| longnote13 = 過渡音樂
| length13 = 0:29

| title14 = 明日之後
| music14 = 王菀之
| lyrics14 = 方-{杰}-
| arranger14 = Jim Ling
| producer14 = 舒文
| longnote14 =
| length14 = 4:28

| title15 = 苦水
| music15 = 沈志煒
| lyrics15 = 林夕
| arranger15 = 舒文
| producer15 = 舒文
| note15 = 國
| longnote15 = 《愛我所愛》國語版
| length15 = 4:09

| title16 = 踏步
| music16 = 雷頌德
| lyrics16 = 李焯雄
| arranger16 = 雷頌德
| producer16 = 雷頌德
| note16 = 國
| longnote16 = 《學行》國語版
| length16 = 2:24
}}

派台歌曲成績
獎項
*勁歌金曲優秀選第二回 - 得獎歌曲《美中不足》
*新城勁爆頒獎禮2004 - 全球勁爆歌曲大獎《美中不足》
*新城勁爆頒獎禮2004 - 勁爆歌曲獎《學行》
*新城勁爆頒獎禮2004 - 勁爆歌曲獎《美中不足》
*新城勁爆頒獎禮2004 - 勁爆卡拉OK歌曲獎《美中不足》
*2004年度叱-{咤}-樂壇流行榜頒獎典禮 - 叱-{咤}-樂壇至尊歌曲大獎《美中不足》
*2004年度十大勁歌金曲頒獎典禮 - 十大勁歌金曲《美中不足》
*第二十七屆十大中文金曲頒獎音樂會 - 十大中文金曲《美中不足》