After Bindi Irwin did not attend an annual gala celebrating her late father Steve Irwin, the Crocodile Hunter, her brother Robert Irwin explained that his sister had to undergo emergency surgery.

Robert Irwin confirmed his sister, Bindi, had made the journey to Vegas, eager to participate in their family's gala that has been running since 2002.

Bindi Irwin and her mom Terri Irwin had to miss the annual Steve Irwin Gala in Las Vegas on May 10 as 26-year-old Bindi experienced a ruptured appendix, requiring surgery "She's g