For the Creamy Salsa, mix mayonnaise and salsa in small bowl until well blended. Cover and refrigerate until ready to serve.
For the Shrimp Tacos, mix chili powder, garlic powder, cumin and salt in small bowl. Toss seasoning mixture with shrimp in medium bowl until evenly coated.
Heat oil in large skillet on medium heat. Add seasoned shrimp; cook and stir 4 minutes or just until shrimp turn pink. Stir in lime juice.
Serve shrimp in warmed tortillas. Top with Creamy Salsa and desired toppings, such as shredded cabbage or lettuce, chopped avocados, tomatoes and fresh cilantro, and lime wedges.