Kylie Minogue says the secrets to keeping her petite frame in check are a healthy diet and Pilates.Kylie Minogue has revealed she achieves her famously fit figure through Pilates and occasional gym sessions.The petite singer explained her diet and exercise regime ensure she maintains her slender physique.The 44-year-old admitted she is not disciplined with her routine and prefers to do activities she enjoys to get her moving."I do Pilates. And when I'm staying in a hotel sometimes go to the gym. But I don't overdo it," Kylie confessed to British magazine Star. "I wish I was one of those women who do their exercises first thing in the morning, or run straight to the fitness studio as soon as they get up. But unfortunately I'm just not that disciplined! I like to go snowboarding in winter."While she is relaxed about her exercise routine, Kylie is stricter about maintaining a healthy eating plan. The Australian singer says she enjoys a diet filled with fish and green vegetables."For lunch I might have grilled fish with veggies, and if Andrés [Velencoso, her partner] is in tow, we tend to go a bit Spanish for dinner - and have something like a piece of tuna on a green salad," Kylie finished.