Who is the most popular male country music singer of 21st century?

The most popular male country music singer of the 21st century is Luke Bryan. He is an American country music singer and songwriter who has achieved numerous awards and nominations, including two Grammy Awards, 26 Academy of Country Music Awards, and 14 Country Music Association Awards. He has also had the most number one hits on the Billboard Hot Country Songs chart among all artists in the 21st century. His top-selling albums include "Tailgates & Tanlines" (2011), "Crash My Party" (2013), and "Kill the Lights" (2015).