— Could you sing the national anthem at a sporting event if there wasn't another singer in attendance?

Dozens of fans attending a ballgame in Fresno, Calif., were miffed that a singer wasn't hired to belt out the "Star-Spangled Banner" during a recent game.

The crowd at a high school softball championship game at Fresno State's Margie Wright Diamond on Friday night launched into their own rendition of the iconic song when the game announcer said the song wouldn't be played because it had already been played before an earlier game.

"I was shocked (when) the announcer stated, ‘There will be no anthem, let’s just play softball,’” fan Tiffany Marquez of Fowler, Calif., told the Fresno Bee.

The spectators' boos gave way to singing when the crowd took it upon themselves to sing the song.