Her group Fifth Harmony have enjoyed phenomenal success since rising to fame on The X Factor USA in 2012.
But as Ally Brooke achieves her dream of performing in Mexico, she's learning the hard way about overzealous fans, after enduring a second physical attack in days.
On Thursday, the pretty brunette was ambushed onstage by a male fan, who slipped past security, attempted to embrace her and then dragged her to the ground.
As thousands of fans looked on in shock, a member of the hired security team stormed behind the interloper, quickly tackling and removing him from the stage.
While the shocking incident appeared to ruffle Ally slightly, she quickly recovered, leaping back to her feet in a split second and eventually resuming her performance.
Footage of the incident was shared on Twitter, with scores of fans expressing their shock at what they