Complex sentence: It became Stefani's first number-one and third top-five album as a solo artist--the only time she reached the top was with her band No Doubt with their third record "Tragic Kingdom" (1995).
Split into simpler sentences: It became Stefani's first number 1 and third top five album as a solo artist. The only time she reached the top was with her band No Doubt with their third record "Tragic Kingdom" (1995).