Here's why:
* Subject: The subject of a sentence is the person, place, or thing that performs the action of the verb. In this case, "Nicole loving dancing" is the thing that is the subject of an implied verb (like "is" or "exists").
For example, you could say:
* Nicole loving dancing is her greatest passion.
Here, "Nicole loving dancing" is the subject because it's what is being described as her greatest passion.