Salma Hayek created a frenzy on April 24 when she posted on Instagram this amazing photo of herself climbing onto a yacht in a canary yellow string bikini. Many fans thought it was a throwback, but it wasn’t. The actress, who’s 56, just happens to look as youthful today as she did 25 years ago. “Looking this young in ur 50s should be illegal, like, whatt,” commented one stunned fan, while another wondered if Salma had discovered the Fountain of Youth. Maybe she has! “Every time I need to feel renewed, I jump into the ocean,” read her caption. The mom to 15-year-old Valentina has been accused of using filters in the past, “but, rest assured, there’s nothing fake about this photo,” a source insists of the Eternals actress. “She’s…