Create a new sentence that is grammatically correct, uses correct punctuation, and expresses the same meaning as this sentence.
She is the best singer
Without a doubt, she is the most outstanding vocalist.
Complete the following task based on the instruction and optional input provided.### Instruction:
Create a new sentence that is grammatically correct, uses correct punctuation, and expresses the same meaning as this sentence.

### Input:
She is the best singer

### Output:
Without a doubt, she is the most outstanding vocalist.