Which Madonna era moment best defined her 1983-1989 breakthrough?

1980s Pop Breakthrough Era (1983-1989) poll options

1980s Pop Breakthrough Era (1983-1989)

Madonna: Madonna to Like a Prayer Era (1983-1989)

Madonna

• The streetwise cool of her debut
• Like a Virgin made her a superstar
• True Blue showed her pop mastery
• Like a Prayer proved her artistic boldness