Cindy Crawford Shows Off Her Flawless Bikini Bod Ahead of 50th Birthday

By
Age ain't nothing but a number!
Cindy Crawford flaunted her incredible physique on Thursday in St. Bart's, rocking a sexy black bikini. The legendary supermodel is turning 50 this Saturday.
Splash News
Check out these toned arms!
Splash News
Crawford and her husband, Rande Gerber, are currently soaking up the sun on the Caribbean island, where Gerber swept his wife away on his Casamigos Tequila private jet.
"@RandeGerber whisking me away for my birthday weekend!" Crawford Instagrammed on Wednesday.

According to an eyewitness, the two couldn't look more in love on their vacay, even after being married for 17 years.
"They are a great couple -- holding hands, looking into each other's eyes, very happy and loved up," the eyewitness tells ET. "Rande is always such a gentleman with her, making sure she is always OK."
Not surprisingly, Crawford's been reflecting on her upcoming milestone birthday. On Thursday, she posted this cute throwback photo of herself blowing out the candles on her epic Vogue-themed cake for her 21st birthday.
"#TBT My 21st birthday. The cake says 'What's Next?' -- now I know!" she wrote.

... 29 years later, and still looking flawless!

ET chatted with Crawford last September while she was promoting her book, Becoming, when she reflected on turning 50.
"As a woman, I don't go, 'Hey, whoopie!'" she admitted. "But I'm grateful for my life. It's just a number, right?"
Watch the video below to find out what her favorite part of her body is.