Kim Kardashian working out twice a day

Kim Kardashian is working out twice a day to regain her sexy figure.

The reality TV star was horrified when a stranger mistook her for her pregnant sister earlier this week, so has embarked on a gruelling exercise regime to lose weight. Even though she is fighting the flu, the 29-year-old socialite is doing two “really tough” workouts a day.

She posted on her Twitter account: “Just finished Barry's Boot Camp! Yes, second workout of the day! Now getting a massage at home! I'm glad I worked out today! Was a tough workout, now hopefully I can get back on track! Need to kick it up! It's so hard to work out when u are sick!”

Kim dropped a dress size earlier this year after embarking on a strict diet. But she claims to have put on weight in the past few weeks, and was devastated when she was confused with her older sister Kourtney, who is eight months pregnant.

Kim wrote: “Some woman just came up to me and said congrats 4 being pregnant! I know she thought I was Kourt but rude! Do I look 8 months preggo? (sic).”