Background: Akina Nakamori (Zhong Sen Ming Cai , Nakamori Akina, born July 13, 1965) is a Japanese pop singer and actress. She was one of the most popular singers of the 1980s in Japan. She is known for her deep, power-house voice. In 2011, one of the most famous Japanese music program "Music Station" held a special programme where they counted down the Top 50 Idols of All-Time (list spans over 4 decades) based on their sales total - Akina Nakamori was in the 3rd position, with total sales of 25,340,000 copies.
Context: Nakamori kicked off 1985 with "Meu Amore," another great success for her, debuting #1 with 631,000 copies sold ultimately and also winning Nakamori the Grand Prix award at the 27th Japan Record Awards. She became the youngest person at the time (20) to be awarded such an honor. Originally, the single was to be titled "Akaitori Nigeta fly away" (The red bird flies away), but the producers felt that the lyrics were not Samba-ish enough. "Meu Amore" was the result of the newly penned lyrics. "Akaiatori Nigeta fly away" was released as a 12-inch single instead, making the No.1 spot as well. Despite the superb b-side song of Babylon which was remixed, it sold a dismal 354,000 overall. She then released "Sand Beige - Sabaku e" which sold 461,000 copies and debuted at number 1. Her next single, "Solitude" also debuted at number 1, but sold merely 336,000 copies.  She also released two albums in 1985. Firstly, Bitter and Sweet, which contained the album version of the earlier hit of "Kazari Janai No Yo Namida Wa" and "BABYLON." It sold 556,000 copies and debuted at number 1 again. Her next album, D404ME, only had a remix version of the hit single "Meu Amore" included. Yet this album sold an impressive 651,000 copies and debuted at number 1.  In 1986, at 21, Nakamori matured in her singing style and choice of songs. The first single of that year, "Desire - jonetsu," proved to be one of the highlights in Nakamori's career. This was also the theme song of PIONEER PRIVATE commercial, and was awarded the Grand Prix at the 28th Japan Record Awards in 1986. She became the youngest winner for two consecutive years. It sold 516,000 copies and debuted at number 1. Her next single "Gypsy Queen" was a calmer song than "Desire - jonetsu" and sold a mere 358,000 copies, but still debuted at number 1. The single "Fin" followed, and sold less than its predecessor, at 318,000 copies. Again, it debuted at number 1.  To commemorate her first 4 years in the business, Nakamori released her first "BEST" album. It sold impressively, 766,000 copies and a comfortable number 1 debut spot. Then Nakamori released Fushigi, a concept album with echoing singing and obscure musical arrangement. It caused quite a stir amongst the mainly conservative Japanese public and thus sold 464,000 copies, nearly 200,000 less than Crimson, an entire album composed by only women, which sold 601,000 copies. But both managed to debut at number 1, Fushigi stayed number 1 for only 3 weeks, while Crimson stayed number 1 for 4.
Question: was that her biggest seller?

Answer:
She became the youngest person at the time (20) to be awarded such an honor. Originally, the single was to be titled "Akaitori Nigeta fly away" (