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What a difference a year makes!
Decked out in a nude, Swarovski crystal-adorned Randi Rahm gown, the 30-year-old country cutie totally rocked the red carpet.
Mind you, the gal has always looked good, but her transformation in the 12 months since the previous ACM Awards is indeed pretty spectacular.
Of course, this isn't the first time we've seen the lovely Lambert with a noticeably thinner frame.