Solbi revealed her well-toned body just in time for the release of her book 'Body Secret'.

She posted the photos on her me2day with, "After my morning work-out in Busan.. After I finished my book 'Body Secret'�and received the printing fee.. I realized gaining weight is not an option.. So i'm exercising while traveling keke. Lets�be careful of our increasing�appetites�during winter ^^Read 'Body Secret' if you want to know about my diet ^^!"

Netizens commented with, "So pretty", "I'm jealous", and "I want to have her body."

Source + image via Solbi's me2day