Who is more popular Kelly Clarkson or Britney Spears?

Popularity can be measured in various ways, such as record sales, chart rankings, social media followers, and concert ticket sales. Kelly Clarkson and Britney Spears are both highly successful and influential artists in the music industry. However, Britney Spears has achieved more commercial success and global recognition throughout her career, making her more popular in terms of mainstream appeal and cultural impact.