She made her major debut in 2012, but had previously performed under the name TASHA gee.
[1] Gille made a name for herself by releasing videos of herself singing English language covers of Japanese pop songs on her YouTube channel appearing only in silhouette,[2] including some English songs such as "Rolling in the Deep", featured on her debut EP Lead the Way.
[3] In June 2012, she released an English cover of AKB48's "Flying Get", and the group's creator Yasushi Akimoto remarked that Gille had a "diamond voice" and fully approved the cover.
Her debut single "Girls / Winter Dream" was released that October, and was noted to sample O-Zone's "Dragostea Din Tei".
[5] This was followed up by the single "Try Again" in January 2013[6] and the album GILLEsound Vol.