One of the most iconic scenes is the sizzling dance number set to “Viva Las Vegas.” Elvis dominates the soundtrack with six musical numbers, while Ann-Margret appears in only two solo performances. Still, her energy and confidence in this scene are unforgettable. Decades later, she remains a perfect example of dancing with total freedom and joy.

Not everything was flawless, though. Sharp-eyed viewers have noticed Elvis’s less-than-perfect lip-syncing during the number. Then again, with Ann-Margret commanding the spotlight, it’s easy to see why most people never noticed. Sometimes, it’s the little imperfections that make a classic even more fun to revisit.