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Katy Perry, brother David Hudson

E! Networks

It was a family affair for Katy Perry in Hollywood earlier this week.

The "Wide Awake" crooner showed up at Bootsy Bellows Thursday night in support of her younger brother David Hudson's musical showcase, which celebrated the release of his new single "Chained."

While her boyfriend John Mayer wasn't in attendance at the Hollywood hot spot, Perry was accompanied by her parents Keith and Mary, and her older sister Angela.

"Katy is so proud of David," an eyewitness told E! News. "She was screaming out her support and had a really great time. It is a very supportive family." 

Bootsy Bellows owners Markus Molinari and John Terzian hosted the event, in which celebs like Mary Kate Olsen, Paris Hilton, Samantha Ronson, Benji Madden, David Arquette and Katy's stylist Johnny Wujek were on hand to take in Hudson's appearance as well.

After David's performance, the superstar singer and her crew stayed and danced to '90s music.