Conversation so far:
What was Namie Amuro doing in 1995?
Namie Amuro signed with Avex Trax as a solo artist in 1995.
What Namie Amuro album was first released by Avex Trax?
Namie Amuro achieved huge success after the release of her first solo studio album, Sweet 19 Blues.
When did Namie Amuro marry?
During a press conference on October 22 of 1997, Namie Amuro confirmed her marriage to Japanese musician and TRF band member Masaharu Maruyama.
Who did Namie Amuro marry?
Namie Amuro confirmed her marriage to Japanese musician and TRF band member Masaharu Maruyama.
Did Namie Amuro and Masaharu Maruyama have kids?
On May 19, Namie Amuro gave birth to her son, Haruto Maruyama.
What was Namie Amuro doing music-wise in 1997?
On February 19, 1997, Namie Amuro released her single Can You Celebrate?, which became her fifth number one single.
What Namie Amuro album was released in 1997?
Concentration 20 is the third studio album by Japanese singer Namie Amuro, released July 24, 1997 by Avex Trax.
What year did Namie Amuro take a hiatus?
Namie Amuro began her one-year hiatus from the music industry before returning on December 23, 1998.
What else is significant about these two years from 1997 and 1998 to Namie Amuro?
Namie Amuro released eight number one singles on Oricon by the end of 1998..
When else did Namie Amuro win MTV VMAJ awards?
Namie Amuro became the first artist to win MTV VMAJ awards four years in a row in 2005.

Question: What was her career breakthrough?
Self-contained rewrite: What was Namie Amuro's career breakthrough?