Usher serenades Kim Kardashian during Las Vegas residency.

The Kardashians had hoped to celebrate her 42nd birthday in October by attending Usher's Las Vegas residency show,

but inclement weather at the time derailed their plans. She was able to travel to Sin City, though, six months later on Saturday to see Usher perform.

She was joined by her hairstylist Chris Appleton and his fiance, Lucas Gage, as well as Chris Appleton.

Teyana Taylor joined the singer onstage for a few of the videos that the reality star posted to her Instagram Story from the performance, which featured the song "Bad Girl."

The most exciting moment for Kardashian, though, was when Usher stopped singing "Superstar" to acknowledge her.

Kardashian reportedly loved the show so much that she promised to return soon on her Instagram Story.

Kardashian had previously shared on social media in October the unfortunate circumstances...

...that prevented her from attending the show as well as a lavish dinner at Carbone in Las Vegas: The SKIMS billionaire explained,

"The plane couldn't land due to the wind so looks like our Carbone party and @usher concert isn't happening, and we are heading back home."