Conversation so far:
What did Ai Otsuka do in 2006?
In April 2006, Ai Otsuka released Frienger. The promotional video was used as the commercial song for the Toshiba W41T 4 GB MP3 mobile phone.
Where was the video for Frienger by Ai Otsuka shot?
The promotional video for Frienger was shot in Taiwan.
Was Ai Otsuka an actress and a singer?
In June 2005, Ai Otsuka made her acting debut with the drama Tokyo Friends.
What singles did Ai Otsuka release?
Ai Otsuka debut single, entitled Momo no Hanabira, was released on September 10, 2003.

Question: Did she have any bestsellers musically?
Self-contained rewrite: Did Ai Otsuka have any bestsellers musically?