Sebastian Vettel has admitted he treated himself to a personal gift after winning the 2010 title.
"I won't lie to you," he told a reporter for Germany's Bild newspaper, after shearing a sheep at a farm outside Melbourne.
"Yes, I did."
But the 23-year-old Red Bull driver is not giving anything else away.
Asked mischievously if he bought a Ferrari, the German smiled: "No, not a car."
Bild added: "A plane?" Vettel: "All I can say is; I have it ordered but it hasn't arrived yet. So you'll have to work a bit harder."
Also this week, another champion Lewis Hamilton admitted he too has splashed out since becoming one of F1's highest earners.
I have it ordered but it hasn't arrived yet
Asked by the Sun what his most expensive purchase has been, the Briton answered: "It's got to be this diamond ring -- it's Bvlgari. It was ridiculously expensive.
"But the most expensive thing I have ever bought was for my girlfriend, I bought her a ring for our anniversary and that was frigging expensive," he added.