Georgina Hope 'Gina' Rinehart (née Hancock, formerly Hayward) is a real life Australian mining magnate and heiress. In the Grubiverse at one point she was thought to be the girlfriend of Colin, the Canned Bum Man (see Episode 88). They apparently rubbed noses together every morning before Colin had had his morning coffee.
It is apparent that this relationship was all a dream however, and that Colin is still trapped with the Red Man (see Bonus Episode 99).