Jessica Simpson has fans thinking she looks “Irresistible.” On Friday, April 5, the pop star uploaded a snap wearing a dainty white romper and platform heels while in tropical paradise. The mother-of-three stood by sparkling blue water as she pouted for the camera alongside the caption, “Thank you @suncabovacations for always bringin’ the CHA CHA CHA to the perfectly exquisite vacation spots.” Users raved over the “I Wanna Love You Forever” singer in her comments section. “You look GORGEOUS 🤍,” one person stated, while another said, “Stunning 🤩 Girl crush for life!” “Jessica still looking youn…