That's one rockin' family!

Miley Cyrus , fiancé Liam Hemsworth and brother Trace stepped out to support sister Brandi Cyrus at the Troubadour in West Hollywood on Monday night.

The trio couldn't be more excited to see Brandi's band Frank + Derol perform.

"They watched the show from the balcony and cheered the girls on," a concertgoer tells PEOPLE.

Trace proudly Tweeted, "My sister Brandi killed it at her show tonight! So proud of her for going on this tour! 1st show was sold out! Good sign!"

Miley also showed her support for her sister on Twitter, sharing a photo of the venue's marquee with followers.

twitter.com/MileyCyrus/sta…

— Miley Ray Cyrus (@MileyCyrus) October 2, 2012

No hard feelings, apparently, for Kim Kardashian toward singer Prince after he ushered her off the stage recently at New York's Madison Square Garden due to her lack of dancing skills. On Wednesday night, Kardashian turned up in the VIP balcony at Prince's surprise last-minute show at the intimate Troubadour club in West Hollywood. She still didn't dance, but she did sway a bit to the music in between sending texts and a Twitpic of Prince with the caption, "Nothing compares."

Ashlee Simpson-Wentz, checking out hubby Pete Wentz's band Fall Out Boy play a secret show at the Troubadour in West Hollywood. The new mom arrived with her parents – Joe and Tina Simpson – to see the group preview songs off their upcoming album, Folie à Deux. But she didn't pull an all-nighter. "They're new parents," the source says. "They didn't want to be away from the baby too long."

Zach Braff and Scrubs castmate Sarah Chalke, checking out upcoming singer-songwriter Ingrid Michaelson at the Troubadour in West Hollywood. According to a fellow concertgoer, Braff was wearing a grey hoodie, attempting to go incognito at the gig, while Chalke, in a navy blue coat, was more "in the open." The pair stood at the bar before moving to the other side of the club.