The singer surprised fans at OMNIA Nightclub on Tuesday night.
The singer and her two youngest boys got in the All Hallows' Eve spirit on Tuesday.
"I'm so proud of all of my boys!"
Shania Twain says Carey was the biggest diva because 'she had the biggest hair.'
On Tuesday, the 49-year-old singer returned to the stage the first time since Sunday's tragedy.
The 49-year-old singer was clearly emotional when she opened her show.
Sin City's biggest headliners are weighing in on Sunday's horrific event. Plus, find out which Las Vegas shows are canceling their performances after the tragedy.
A number of Vegas performers have offered up their condolences to victims of the fatal attack in the city.
Jason Aldean, Celine Dion, Jake Owen and more stars spoke out on social media following the attack.
In times of need, celebrities are giving back.
The 49-year-old singer kept coy about her personal life at benefit event.
The singer also sang Tom Petty's "Free Fallin'" when asked about her personal life.
We gotta learn this victory dance.
ET recently caught up with the 'World of Dance' judge at the NBC TCA event in Los Angeles.
