The two beautiful Jung sisters unintentionally had an 'abs-off' in their individual photo shoots.

Girls' Generation's�Jessica revealed her toned stomach for the April issue of 'W Korea' where she showed her sexy side by matching a short lace top with white skinny jeans, while f(x)'s Krystal took on spring fashion with a street casual look for 'Vogue Girl'. She showed off her abs in a cropped top and white skinny jeans as well.

Although it's too close to call which sister has nicer abs, it's easy to tell the sisters have inherited some superb genes.

Netizens also complimented the two stars on their flawless figures.