diff --git a/litellm/router.py b/litellm/router.py
index a1f9fcfc7..796cbb985 100644
--- a/litellm/router.py
+++ b/litellm/router.py
@@ -61,10 +61,8 @@ class Router:
 
         data = deployment["litellm_params"]
         data["messages"] = messages
-        for key, value in kwargs.items():
-            data[key] = value
         # call via litellm.completion() 
-        return litellm.completion(**data)
+        return litellm.completion(**{**data, **kwargs})
     
     def text_completion(self, 
                         model: str, 
@@ -80,10 +78,8 @@ class Router:
 
         data = deployment["litellm_params"]
         data["prompt"] = prompt
-        for key, value in kwargs.items():
-            data[key] = value
         # call via litellm.completion() 
-        return litellm.text_completion(**data)        
+        return litellm.text_completion(**{**data, **kwargs})        
 
     def embedding(self, 
                   model: str,
@@ -96,7 +92,7 @@ class Router:
         data = deployment["litellm_params"]
         data["input"] = input
         # call via litellm.embedding() 
-        return litellm.embedding(**data)
+        return litellm.embedding(**{**data, **kwargs})
     
     def set_model_list(self, model_list: list):
         self.model_list = model_list
diff --git a/litellm/tests/test_router.py b/litellm/tests/test_router.py
index 4206c6325..a2a311c5a 100644
--- a/litellm/tests/test_router.py
+++ b/litellm/tests/test_router.py
@@ -68,14 +68,14 @@ def test_function_calling():
 	litellm.set_verbose =True
 	model_list = [
 		{
-				"model_name": "gpt-3.5-turbo-0613",
-				"litellm_params": {
-					"model": "gpt-3.5-turbo-0613",
-					"api_key": "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",
-				},
-				"tpm": 100000,
-				"rpm": 10000,
+			"model_name": "gpt-3.5-turbo-0613",
+			"litellm_params": {
+				"model": "gpt-3.5-turbo-0613",
+				"api_key": os.getenv("OPENAI_API_KEY"),
 			},
+			"tpm": 100000,
+			"rpm": 10000,
+		},
 	]
 
 	messages = [
@@ -106,4 +106,48 @@ def test_function_calling():
 	response = router.completion(model="gpt-3.5-turbo-0613", messages=messages, functions=functions)
 	print(response)
 
-test_function_calling() 
\ No newline at end of file
+### FUNCTION CALLING -> NORMAL COMPLETION
+def test_litellm_params_not_overwritten_by_function_calling():
+	try:
+		model_list = [
+			{
+				"model_name": "gpt-3.5-turbo-0613",
+				"litellm_params": {
+					"model": "gpt-3.5-turbo-0613",
+					"api_key": os.getenv("OPENAI_API_KEY"),
+				},
+				"tpm": 100000,
+				"rpm": 10000,
+			},
+		]
+
+		messages = [
+			{"role": "user", "content": "What is the weather like in Boston?"}
+		]
+		functions = [
+			{
+			"name": "get_current_weather",
+			"description": "Get the current weather in a given location",
+			"parameters": {
+				"type": "object",
+				"properties": {
+				"location": {
+					"type": "string",
+					"description": "The city and state, e.g. San Francisco, CA"
+				},
+				"unit": {
+					"type": "string",
+					"enum": ["celsius", "fahrenheit"]
+				}
+				},
+				"required": ["location"]
+			}
+			}
+		]
+
+		router = Router(model_list=model_list)
+		_ = router.completion(model="gpt-3.5-turbo-0613", messages=messages, functions=functions)
+		response = router.completion(model="gpt-3.5-turbo-0613", messages=messages)
+		assert response.choices[0].finish_reason != "function_call"
+	except Exception as e:
+		pytest.fail(f"Error occurred: {e}")