Jay Z and Beyonce Hillbilly Swag ... Hawaiian Style!! [TMZ TV]

4/10/2015 10:00 AM PDT

They've got enough cheddar to BUY their own island, but Beyonce and Jay Z went low key in Hawaii ... cruising around in the bed of a pickup truck. If they were trying to fly under the radar, it didn't work.

Sorry, Jay & Bey -- can't hide that kinda money ... even in a truck. ALOHHH-HA!