Year 18 (XVIII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Caesar (or, less frequently, year 771 Ab urbe condita). The denomination 18 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

18... is the debut album by Chinese Singer-songwriter G.E.M. released October 2009 on Forward Music Co, Ltd. The album contains 12 songs and consists the genres of Cantopop, Mandopop, R&B, soul and rock ballad. 18... was simultaneously released with the limited edition, 18 Plus, on 27 October 2009. The 18 USB was initially released for G.E.M.'s 18 Live Concert on 11 November 2009, however, it was later put on general sale. Due to the popularity of the album, it was republished as the 18... (3rd Edition), it also includes bonus track "Smoking, Drinking & Swearing"(食煙飲酒講粗口), Jan Lamb featuring G.E.M., was added to the disc. Prior to the Taiwanese market, 18... (Taiwanese Edition) was released on 5 April 2010, this edition was added three Mandarin tracks (one is new recorded '寫不出的溫柔' and other two are previously tracks from her self-titled EP). It was also released with a limited edition version, however, this album has a reordered track list.