Robert Kakaha (born March 5, 1970), also known as Bob Zilla, is an American musician who is the bassist for rock band Hush Money.

He also played with the rap rock band Hellafied Funk Crew, with Shadow Reichenstein, and Vanilla Ice.

On December 8, 2004, Dimebag Darrell was shot onstage by former US marine Nathan Gale in Damageplan's tour at Alrosa Villa in Columbus, Ohio.

Three years later, Kakaha joined Hellyeah after original bassist Jerry Montano was dismissed from the band for violent behavior.

[3] In January 2015,[4] Kakaha joined Hush Money, a rock band from Dallas, Texas.