Ever wondered what f(x) members Luna and Victoria chomp on during breakfast to fuel their hectic idol days? The two ladies clued Instagram fans in on their favorite morning meals through separate photo posts.

Luna likes to have a packed breakfast of fruits and iced coffee. She uploaded a photo showing a full plate of guava and papaya plus a frothy iced latte. Fans commended the idol for her nutritious yet yummy food and wisher her to have good health: "Eat a lot," "Delicious!" and "Stay healthy, my pretty princess," fans said on Instagram.

Meanwhile, Victoria revealed her preference for sandwiches. Just an hour after Luna uploaded her breakfast spread of fruits and coffee, Victoria snapped a shot of her thick sandwich which already had a few bites into it. The idol did not mention what kind of filling she put in the sandwich, but it looked to be ham-and-cheese double-decker.

Between the two f(x) ladies, Luna posts food shots on Instagram more frequently. In the past couple of months, Luna has shared a family party where ate delicious chicken and curry, mouthwatering ice cream and chocolate desserts, and pizza.

It is all the more impressive that Luna seems to eat whatever she wants and still retain a slim figure for her magazine appearances, like last month's multi-spread shoot for International bnt.

Victoria has an equally slim figure these days, as seen in the latest teaser photos for her upcoming Chinese drama Beautiful Secret.

Which of the two breakfast options do you prefer - a refreshing plate of fruits and ice coffee, or a filling sandwich?