In 1966, Lai, her sister and other four male singers formed a musical band BumbleBee to promote their traffic and road safety song in Hong Kong.
In late 1967, Lai contested and won the Hong Kong's Queen of Singing Diva (香港歌后) title, and was encouraged by Robert Chua to sign up to become one of TVB's first batch of actors and actresses.
[1] Sum Sum took up a training lesson of Jeet Kune Do with Bruce Lee while he was in Hong Kong with his young son Brandon on 3 April 1970, prior to Lee's appearance in Enjoy Yourself Tonight four days later in 7 April.
In 1997, she was invited by TVB to host the reestablished but short-lived variety show Enjoy Yourself Tonight.
The ceremony was held at a hotel in Vancouver in 1992, prepared by her friend Louise Lee.