The recent killing at a Las Vegas concert stunned the rest of the world on Sunday. The incident that took the innocent lives of 58 individuals and injured about 500 concertgoers is now considered the deadliest mass shooting in the modern U.S. history.

Authorities identified Stephen Craig Paddock, 64, as the person responsible for the attack. The retired accountant reportedly fired from his hotel room on the 32nd floor of the Mandalay Bay Resort and Casino. The suspect was found dead after he opened fire at the concert ground where thousands of people gathered to watch the Route 91 Country Music Festival.

Deadliest mass shooting in modern U.S. history

Jason Aldean and his band were in the middle of their final set when gunfire was heard in the open field. Although they initially carried on with the performance, the singer and his crew immediately stormed off the stage upon hearing the second round of gunshots. Similarly, attendees of the music event hid and ran for their lives as bullets flew around them.

The senseless killing was denounced by artists and celebrities, with some of them campaigning for tougher gun control laws following the Las Vegas attack. Among those who have responded to the incident was Ariana Grande who dubbed the incident an act of terrorism.

Ariana Grande wraps up 'Dangerous Woman' tour

The 24-year-old singer even recalled her traumatic experience during her "Dangerous Woman" concert tour in Manchester back on May 22.

After a night of fun and music, a shrapnel-laden homemade bomb exploded outside the Manchester Arena and killed 23 individuals and injured 250 others.

Although heartbroken of what happened, Ariana Grande carried on and was able to wrap up the concert tour just last month in Hong Kong. Speaking with Coveteur, the singer-actress said it was their desire to deliver the message of her "Dangerous Woman" tour that made them decide to go on despite what happened in Manchester.

“I don’t think I’ve been through anything as traumatic as [what] we’ve been through," she recalled. “Calling it off and going home was not an option. The message of the show was too important."

She added that the concert tour has become more than just a show for her and her entire team. When asked what she plans to do following the success of her third concert tour, Ariana Grande said she would like to focus on her health following reports of her health issues in the course of the tour. The singer even had to cancel her show in Vietnam last August due to health problems.