G.E.M. (stands for "Get Everybody Moving"; Chinese stage-name: 鄧紫棋, Jyutping: Dang6 Zi2 Kei4; born Gloria Tang, Chinese: 鄧詩穎; Jyutping: Dang6 Si1 Wing6, 16 August 1991 in Shanghai), is a singer-songwriter from Hong Kong.

G.E.M. was born in Shanghai and moved to Hong Kong at the age of four. She was brought up in a musical family, her mother graduating from the Shanghai Conservatory of Music, her grandmother teaching singing, her uncle playing the violin and her grandfather playing the saxophone for an orchestra. G.E.M.’s own musical life began when she was five, and she appeared on Educational Television for Mandarin when she was about seven. G.E.M. started writing songs as a composer at the age of ten entering many singing competitions, winning inter-school singing competitions. When she was 13, she achieved a grade 8 in piano.

In 2006, G.E.M. entered the “Spice it Up” competition in which she won first place. She caught the attention of her now-manager, Tan Chang, who offered her a contract with Hummingbird Music thus becoming a professional singer at 16. G.E.M. graduated from Heep Wah Primary School and True Light Girls' College in Yau Ma Tei, Hong Kong, scoring 21 points on the HKCEE. G.E.M. continued with her education at the Hong Kong Academy for Performing Arts in acoustics, as a part-time student. However, her busy schedule made her unable to attend classes frequently, and she decided to quit the course during the first half of 2009.