Actress Catherine Zeta-Jones is owning summer! The “Chicago” star just dropped a sizzling swimsuit snap on Instagram, leaving fans speechless with her ageless look and infectious confidence. Catherine Zeta-Jones’s recent social media post is proving that age is merely a number. The 54-year-old actress recently took to social media to showcase her stunning physique, leaving fans in awe of her timeless beauty. On June 25, “The Terminal” actress posted a picture on her Instagram stories. She flaunted a chic black one-piece swimsuit with a stylish one-shoulder neckline. “Oops! You caught me posing…