Cook the pasta according to package instructions.
Drain and rinse the pasta with cold water.
In a large bowl, combine mayonnaise, sour cream, lime juice, chili powder, salt, and pepper.
Add the cooked pasta, corn, cherry tomatoes, red onion, and cilantro to the bowl.
Taste and adjust seasonings as needed.
Chill the pasta salad in the refrigerator for at least 30 minutes.
Serve and enjoy your creamy street corn pasta salad.