Born and raised in Malaysia of Chinese descent, she currently resides in Petaling Jaya, Selangor with her family. She holds a bachelor's degree in Business Management and can speak fluent Malay, Mandarin and English while also learning Tagalog to help her television acting career in the Philippines. She was part owner of a boutique named 'Kushi' located in Bangsar.
Soo began modeling at age 17 and moved to Hong Kong at age 20 to further her modeling career, which has brought her all over Asia, including Singapore. At 156 cm (just under 5'1") tall, her petite size is not conducive to catwalk modeling, hence most of her shoots tend to be print and television commercials. However, she has graced local magazines' covers such as New Man, V Mag, New Tide and Nu You. She is a spokesperson for international watch brand Longines along with Malaysian theatre personality Paula Malai Ali, and for Celcom with Singaporean singer JJ Lin.
Soo was an extra in the 1999 Jackie Chan movie entitled Gorgeous alongside Shu Qi, and later was in Aaron Kwok's musical special.
Her most recent live acting performance was the stage play The Girl from Ipoh and her most recent television acting role is in Trio & a Bed, where she is one of the three female leads, together with Amber Chia and Annabelle Kong. The show also stars three other male counterparts as their various and overlapping love interests - Daniel Tan, Danny Wan and Jeffery Chong.
In September 2008, Carmen starred in an ABS-CBN (in collaboration with Malaysia's Double Vision) soap opera with Filipino actors Jericho Rosales, Cristine Reyes and Christopher de Leon in the teleserye Kahit Isang Saglit that was aired in Philippines and Malaysia, and worldwide by TFC. Kahit Isang Saglit later earned an International Emmy Award nomination.