Los Angeles: Reality star Kim Kardashian seems to have been sticking to her New Year's Resolution of hitting the gym hard, as she stepped out in a skimpy bikini flaunting her leaner self.

For the first time in months, the 'Keeping Up with the Kardashians' star went out in a two piece to show off the results of her rigorous workout sessions.

Wearing a teeny black string bikini with gold embellishments, the 31-year-old enjoyed the warm weather and sun in Miami earlier this month while showing off her famous curves, as reported.

Besides getting her fitness ,Kardashian has been hard at work putting her critics in their place.

On Monday, she took a moment to address the nasty commenter’s on her blog.

"I've said it before, and I'll say it again... I will not allow bullying on my blog. You can say what you like about me, but when you come on here and harass and bully other fans, you WILL be banned from leaving comments," she posted.