(backronym of Get Everybody Moving) or Tang Tsz-kei[b], is a Hong Kong singer, songwriter, and producer.

Her debut studio album, 18... (2009), was named one of the top ten best-selling records in the territory in 2009.

It also made her the youngest nominee for Best Female Mandarin Singer in the history of the Golden Melody Awards.

In 2014, her appearance on the Chinese singing competition I Am a Singer 2 gained her immense popularity in Greater China.

released her first studio album recorded entirely in Mandarin, titled Heartbeat, which produced the singles "Long Distance", "Goodbye", and "Away".

departed from Hummingbird Music after 11 years following a contractual dispute, and subsequently launched her own management company G-Nation.

Tang Sze-wing was born on 16 August 1991, in Shanghai, China; she was given the English name Gloria by her father.

spent her childhood at Caoyang New Village[2] and lived with her maternal grandmother who died in March 2011.

won the champion in the singing competition titled Spice It Up, and caught the attention of Chang Tan (張丹), who offered her a recording deal with Hummingbird Music.

She graduated from Heep Woh Primary School and True Light Girls' College with a score of 21 points in HKCEE.

[9] In 2008, she attended Hong Kong Academy for Performing Arts, but dropped out in 2009 due to her decision to focus on her singing career.

18 Live 2009 at Hong Kong International Trade and Exhibition Centre, and the concert featured special guests including Jan Lamb and Justin Lo.

In May, she became the youngest nominee ever of Golden Melody Award for Best Female Vocalist Mandarin, with her album Xposed.

In June, she released a cover of Chinese smash hit Intoxicated, which was played for 15 million times on QQ Music within a week.

In January 2014, she appeared in the second season of Hunan TV's I Am a Singer 2 alongside Han Lei, Zhou Bichang, Phil Chang, Gary Chaw and others, which was broadcast to over 200 million people.

[20] On 10 February 2015, JJ Lin published the official music video for his song "Beautiful" (手心的薔薇) featuring G.E.M..

In the same year, she was asked to voice a lead role in the animated film Charming, alongside Demi Lovato, Ashley Tisdale, and Avril Lavigne.

[22][23] She also performed at Heroes of Remix that same year, singing EDM versions of songs such as "Loving You" (喜歡你) and "The Brightest Star In The Night Sky" (夜空中最亮的星), among others.

In November 2016, she earned an MTV Europe Music Award for Best Mainland China & Hong Kong Act.

released the Chinese theme song for the science fiction film Passengers titled "Light Years Away", which she also performed on several occasions, including NASA 2019 Breakthrough Prize.

On 21 October 2017, Chinese-Malaysian hip hop artist Namewee published a video featuring her in a cover of his song "Stranger in the North (KTV Version)" (漂向北方), which had received widespread popularity, where she sings the chorus which was originally performed by Taiwanese-American singer-songwriter Wang Leehom.

[24] On April, she was invited to be the duet partner for Hua Chenyu in the finals of Singer 2018 and sang "Light Years Away".

In 2018, G.E.M announced that she would be working on a project, Fairytale Trilogy, where each of the three EP's will feature three new songs written by herself, and produced by Lupo Groinig.

[29] On 26 October, the second EP, Fearless, with the single "Woke", was released digitally on Chinese streaming platforms and worldwide on 9 November.

[33] Then beginning March 2019, she resumed her Queen of Hearts World Tour with concerts across Canada, US and Eastern Asia.

[1] She has stated that her work has been stressful, but that "her faith in God has kept her through the hardships of her career and allowed her to grow in trials".

[1] On 7 March 2019, she announced that she would no longer be represented by Hummingbird after three months of negotiations on her contract and allegedly being pressured to work.

and "Tang Tsz-kei" are trademarks held by Hummingbird, it was speculated that she may have to give up using the stage name.

Should their case succeed and she leaves the company, she may have to pay HK$120,000,000 (approximately US$15 million) as compensation for losses.

had since filed a counter-suit for unspecified damages, claiming that the company had failed in fulfilling their contractual duties.