Question: When did the artist who was a guest judge in Under the Gunn begin her music career?
Sentence (from "MasterChef Vietnam (season 3)"): Christine Ha, the first blind and Asian winner for season 3 of US version of Master Chef became the third judge, having been a guest judge in the previous two series and in MasterChef US season 4 and MasterChef US season 6.
Relevant evidence: No