Heat olive oil in a pan over medium heat. Add shrimp, cayenne pepper, and lime juice. Cook until shrimp turn pink, about 5-7 minutes.

Remove from heat and set aside.

In a mixing bowl, combine diced mango, red onion, corn, cilantro, and salt. Mix gently.

In each taco shell, layer shredded lettuce, cooked shrimp, and top with mango salsa.

Add a dollop of sour cream on top and serve.