Choi's first solo song, Diva, Ah Hey!, was released in Twins' 2003 album Touch of Love. The song received a nomination for Best Song at the 23rd Hong Kong Film Awards and won a place in the Top 10 Songs at the Jade Solid Gold Songs Awards Ceremony. Choi's second solo song, Watching Movie Alone, was released in Twins' 2006 Mandarin album Around the World with 80 Dollars. Choi's third solo song, You are Not a Good Lover, was released in Twins' 2006 Cantonese album Ho Hoo Tan. This was Choi's first recorded personal composition and Twins' recorded version earned the place of Hit Song at the Metro Showbiz Hit Awards and one of the Top 10 Songs at the Jade Solid Gold Songs Awards Ceremony.