In 2015, she participated in K-pop Star 5, a South Korean reality TV competition series where her group came in fourth place.

While shooting the TV show K-pop Star 5, Liu applied and was accepted to Fordham University to study global business.

[6] In July 2018, Liu participated in The Rap of China, entered the final round with her song "Mulan," and eventually finished fourth place.

[citation needed] The Line of Best Fit described "Nada" as it "sees Lexie Liu's fierce, cross-cultural grit thrust into a science fiction dimension where language barriers don't exist, She fuses Mandopop with grimy beats against the visuals of her accompanying Tron-esque video, directed by mamesjao, in a retro-futuristic digital world.

In February 2019, Liu released her debut EP 2030 in the United States, which included two new singles "Outta Time" featuring Killy and "Love and Run.

[16] On October 28, 2020, Liu voiced the champion Seraphine in Riot Games' virtual K-pop group, K/DA, in their new song "More" from their extended play All Out.

"Fortuna" marks a slight change in Liu's style as a high-energy, electropop-inspired track making use of Mandarin, English, and Spanish in the lyrics.

The lyrics make reference to the major arcana of the Magician, the Moon, the Sun, and the general suits of the Cups, the Wands, and the Pentacles found in tarot decks.

Lexie Liu's distinct appearance caught the attention of the fashion industry where she landed placements in Paris Fashion Week 2019 as the brand ambassador for Yves Saint Laurent eyewear in the Asia Pacific Region,[21] Louis Vuitton Show 2018 in China, Puma's Suede 50 campaign, and Levi's New Years TVC campaign.

'"[12] After the release of her single "Like A Mercedes," the cyberpunk-inspired music video of the song was Lexie Liu's first introduction to a global audience, showing off how "her provocative sound is transcending language barriers.

"[23] Her debut EP released in February 2019 was highly recommended, "with a feature from Killy on "Outta Time," plus new singles "Sleep Away," "Hat Trick" and "Nada," the eight-tracker is an impressive bilingual project showcasing the Changsha born and raised artist’s skills across rap, R&B vocals and production.