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Kourtney Kardashian has revealed how she shed 20kgs after the birth of her second daughter Penelope only six months ago.

However, she admits that getting back her gorgeous slim figure wasn't an easy task.

'It was harder to lose weight the second time around. I gained 45 pounds with Penelope'

Kourtney also said that it was Tracy Anderson's 90-minute dance-focused workouts and eating small portions to help with losing the weight. 

See the pics online here.

All eyes are now solely focused on sister Kim, who earlier this week announced that she is expecting her first child to rapper boyfriend Kanye West.