Kristina Ambartsumian was in attendance at the music festival, which became the scene of the largest shooting massacre in modern U.S. history.
The 66-year-old singer last performed with the Heartbreakers on Sept. 29.
The 'Playboy' founder's closest friends and family gathered together at Los Angeles' Westwood Village Memorial Park Cemetery on Saturday.
Many of Hollywood's biggest stars are sending out prayers after Sunday night's terrible shooting that killed dozens, but are also using the moment to call for better gun control legislation.
"GUN CONTROL NOW. ENOUGH ALREADY," Billy Eichner tweeted.
ET was with Dhia for a tour of the MTV show's new studio in Times Square. The 'Total Request Live' revival premieres Mon, Oct. 2 on MTV, less than 24 hours after a horrific shooting in Las Vegas.
Many other stars, including Mariah Carey, Taylor Swift and Jake Owen, spoke out about the tragic news on Monday.
The actor made a rare appearance with his daughter while promoting his movie, 'Meyerowitz,' on Sunday.
Ariana Grande is calling for gun control after the deadly Las Vegas shooting on Sunday night,
Here’s what ET is obsessing over this week!
Don Lemon enjoyed a rare date night with boyfriend Tim Malone.
The singer made an appearance on 'Good Morning Britain' just moments after the news broke of the mass shooting at the Route 91 Harvest Country Music Festival.
Kirsten Dunst is a beautiful bridesmaid.
The former star of 'The Hills' welcomed her first child in July.
