Who’s that girl?! Amber Portwood shocked fans on Monday, Aug. 10, when she took to Twitter to show off her impressive weight loss. 

Posting a slimmed-down selfie, the Teen Mom OG star, 25, tweeted, “36 lbs down and 15 more to go…almost at my goal.”

Many of her followers asked about the reality star’s tactics for shedding the pounds, prompting her to offer several tips.

“Cut out bad carbs like sugar and cut down on pasta to start..also try to not eat trans fats,” she tweeted, telling another fan she slimmed down by “eating healthy and cutting out bad carbs.” 

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As for how long her impressive slim-down took, Portwood managed to lose the weight in almost no time at all. 

“It took about 4 months…but I fell off for a couple weeks,” she admitted. 

Portwood’s last big public appearance was back in April, when she walked the red carpet at the MTV Movie Awards with her fiancé, Matt Baier. 

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