Which Beyonce solo era from Dangerously in Love to 4 was her most iconic breakthrough moment?

Solo Pop-R&B Breakthrough Era (2003-2011) poll options

Solo Pop-R&B Breakthrough Era (2003-2011)

Beyonce: Dangerously in Love to 4 Era (2003-2011)

Beyonce

• Dangerously in Love launched the legend
• B'Day proved her star power
• I Am... Sasha Fierce owned pop culture
• 4 showcased her vocal and artistic peak