Twins are a Hong Kong Cantopop duo that was created in the summer of 2001 by Emperor Entertainment Group (EEG). Twins are made up of two girls, Charlene Choi and Gillian Chung. They are a popular group in Hong Kong and a top band in China. Their fanbase have included Taiwan, Japan, Singapore, Thailand, Malaysia, Canada, Australia, United States, Vietnam and Philippines. Their music was generally targeted at young teens, but in 2004 they began to attract a wider audience by venturing into different styles of music. In February 2008 the duo temporarily separated after the Edison Chen photo scandal involving Gillian Chung. After two years the group finally reunited in 2010.

Since 2001, group released twelve Cantonese studio albums, four Mandarin studio albums, three extended plays, five compilation albums and four live albums. Most of their singles reached the top of many musical charts.

Gillian Chung had also worked as a part-time model during one of her summer vacations in Hong Kong. Similar to her erstwhile partner, Charlene Choi was also a part-time model who had appeared in several advertisements. She became famous after her participation in the Radio Television Hong Kong (RTHK) television program Y2K. Both caught the attention of EEG manager Mani Fok (霍汶希). They subsequently auditioned for and later formed the duo known as "Twins". They initially collaborated with MSN to make personal pages and web games. Twins signed to Emperor Entertainment Group and in August 2001, they released their debut EP Twins (AVEP) with hit single "Open Love, Secret Love, Tutoring Institute". EP contained 3 music videos and 6 songs. It went platinum in its first week of selling. In November, Twins released their second EP Twins' Love which contained 8 songs and 1 music video, for the lead single, "Slam Drunking Love". In January 2002, Twins released their third EP Twins. The EP contained one CD with five new songs, and a VCD, with 2 music videos. Since it was near Chinese New Year, the single "Ma Bao 668" was a greeting song for Chinese New Year. In May 2002, Twins finally released their debut album Our Souvenir with two discs. Disc one, CD contained 10 tracks with single "Er Ren Shi Jie Bei". Disc two was a VCD, with two music videos. Their debut album (just like a debut EP) was a great success. In August 2002, Twins released second album Amazing Album, consisted of two discs, CD with 11 songs, and a DVD with three videos. In 2002, Twins had their first concert ever, and three more in 2003 (which were held in Guangzhou). Between 2001 and 2003, they received a total of 72 total awards. By 2003, they have received a large number of awards from the four major Hong Kong media organizations of RTHK, Commercial Radio Hong Kong, Metro Radio and TVB. In April 2003, they released third album, Touch of Love. It contained two discs, CD and DVD. Two months later, in June 2003, the second version of the album was released with a new single and its music video "Bian Bian Bian". The song was theme for their movie The Twins Effect and sung by Twins and Jackie Chan. With the brand new look, Twins released 1 disc 10 track fourth album named Evolution in September 2003.

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