Christina Aguilera is back, baby! The singer, 43, performed at her Las Vegas residency, which opened in December 2023, looking amazing in a sleek bodysuit. According to an insider, the blonde beauty went to great lengths to make sure she was ready for her 90-minute show. “Christina wanted to be in the best shape possible for Vegas and knew she’d have to build up her stamina,” an insider revealed. “For her it was a lifestyle change. She lost the weight by scaling way back on carbs and sweets and alcohol and focusing on fresh vegetables and lean proteins,” the source noted. Additionally, the “Ge…
