[6] He grew up in Blue Bell, Pennsylvania, a street away from Kurt Schneider, his producer and accompanist, with whom he attended Wissahickon High School.

He also appeared on It's On with Alexa Chung, singing Journey's "Don't Stop Believin'" for the cast of American television series Glee.

The album, released on February 9, 2010, features covers of hits from Michael Jackson, Journey, Beyoncé, Jason Mraz, and Lady Gaga among other artists.

[17] On December 2, 2010, Tsui gave an interview on The Ellen DeGeneres Show and performed a mashup of Katy Perry's "Firework" and Bruno Mars' "Grenade" with Schneider.

The video, entitled "That's Why I Chose Yale",[23] reveals information about the college with students and admission officers breaking out into song across the campus.

[25] He recorded a "Judges Medley" that included Sara Bareilles' "Love Song", Ben Folds' "Gone" and Shawn Stockman's (Boyz II Men) "On Bended Knee".

[27] In summer 2013, Tsui and Schneider toured across Canada and the US with Alex Goot, Against the Current, Landon Austin, Luke Conard, and King the Kid.

In 2013, Kurt Hugo Schneider and Coca-Cola teamed up to create music videos featuring creative covers of two 2011 hits namely Calvin Harris' "Feel So Close" and Of Monsters and Men's "Little Talks" for a campaign called "The Sounds of AHH".

The commercial edits of both premiered on the inaugural episode of season 13 of American Idol on January 14, 2014, on FOX with "Feel So Close" featuring the vocals of Tsui whereas Schneider makes music playing only Coca-Cola bottles, glasses and cans.

[31] On April 15, 2016, Tsui posted a coming out video on his YouTube channel in which he announced that he is gay and in a long-term relationship with fellow musician and collaborator Casey Breves.