Christina Aguilera, 45, has barely aged as she rocks hotpants she would've worn in 2002

Also mentioned: Demi Lovato

The singer drastically changed her image for the raunchy record, Stripped, which prompted fans to label her 'Xtina'. On Sunday (October 11), Christina attended MISTR's second annual National PrEP Day Celebration at The Abbey Food & Bar in West Hollywood, sporting a look that wouldn't have been out of place more than two decades ago. At the bash, where several stars spotlighted HIV prevention and access to the medication PrEP, Christina posed in a black, sheer, figure-hugging dress over a tiny leather skirt, which she paired with matching thigh-high heeled boots.