Christina Aguilera wowed the crowd in more ways than one during the opening night of her Las Vegas residency -- showing off an incredible 40 lb. weight loss.
The iconic singer belted out her catalog of hits on Saturday night from The Voltaire at The Venetian.
Xtina's new toned and slender figure was front and center in a series of tight leotards and thigh-high boots.
"The first of many midnights with all of you, HAPPY 2024 💎✨," she captioned a series of pictures on Instagram.
After years of scrutiny for her fluctuating weight, XTINA's maintaining a healthy physique ... previously admitting she hated being skinny and loved her booty.
Christina shared that she's eating a balanced diet and dedicates herself to boxing, strength training, and cardio workouts.