There’s nothing holding them back! Shawn Mendes and Camila Cabello got hot and heavy in Miami Beach, showing major PDA as they enjoyed a day at the beach and in the pool.The couple hasn’t publicly commented on their relationship, though. In fact, the Canadian crooner even denied that he was dating Cabello on July 6, shaking his head “no” when a fan asked him about the rumors at a Q&A in Los Angeles.