Megan Park, Codi Caraco and Brandi Cyrus
06/17/2009 at 06:00 PM EDT
Move over Miley
: There's a new Cyrus in the spotlight.
The Hannah Montana
star's older sister, Brandi Cyrus, recently performed with her band Frank and Derol, which includes lead singer Codi Caraco and Secret Life of the American Teenager
star Megan Park, who plays bass and sings. The trio made their big stage debut opening for another Cyrus of note – Brandi's dad Billy Ray – at Los Angeles's House of Blues on Sunday.
Not that this was a first gig for Brandi, 22. She's been a guitarist for Miley on tour and on Hannah Montana.
"I was really excited because the House of Blues is such a cool venue and we have been working so hard, rehearsing every day," says Park. "Honestly, I just couldn't wait to get up and do it again!"
Park and Caraco formed the indie pop group less than a year ago after meeting at a family friend's birthday party. Park later recruited close pal Brandi to write songs with them and "we really liked what she contributed," Park told PEOPLE, "so we started working with her a lot more and it all naturally fell into place."
Out to support Brandi's first major public performance: None other than Miley's ex, Justin Gaston, who was spotted in the VIP balcony and stayed through the end of the show. Miley, meanwhile, was in Georgia filming her new movie, The Last Song
The all-girl band plans to continue performing at various venues while pursuing a record deal.
Reporting by ESTHER ZUCKERMAN