#11 Usher: Billboard's The 25 Greatest Pop Stars of the 21st Century

[ThisGuyTony 27,934]

This list is making me nervous for Gaga cause there’s still:

Beyoncé, Taylor, Britney, Post Malone, The Weeknd, Justin Bieber, Pink, Drake, Ariana and who knows if Madonna (chart success thru 2008 and a touring force) and Mariah (chart success thru 2008 and recurrent AIWFCIY chart success) count.  
And who knows who else Billboard might consider  

[James Gibson 3,427]

3 hours ago, ThisGuyTony said:

This list is making me nervous for Gaga cause there’s still:

Beyoncé, Taylor, Britney, Post Malone, The Weeknd, Justin Bieber, Pink, Drake, Ariana and who knows if Madonna (chart success thru 2008 and a touring force) and Mariah (chart success thru 2008 and recurrent AIWFCIY chart success) count.  
And who knows who else Billboard might consider  

The Weeknd and Post were already listed.

Then you have 9 very strong contenders with Gaga (I'd add Rihanna as the 10th). I think she's safely in but hopefully in the top 5.