Since splitting last summer, the US beauty has been dating tennis player Grigor Dimitrov, 25, since July, while Lewis has been linked to a number of high-profile ladies including models Barbara Palvin and most recently, Winne Harlow.
She explained: 'I think I've probably matured a little later in relationships and living my life because I started at such a young age then being in a rock group then being in a pop group then being in [groups and bands].
Her father is of Filipino descent and her mother is of Russian descent.
Her parents separated when she was a baby and her maternal family moved to Louisville, Kentucky.
The US star has been dating tennis ace Grigor Dimitrov since July 2015, and she couldn't be happier.
"Eric is so sweet, he speaks such proper English, it cracks me up," the star continued. It's great to see Simon so happy." CLICK TO VIEW GALLERY Simon Cowell pictured with his son Eric Nicole's career is riding high – and so too is her personal life.
One fan even gave Nicole a custom jersey with her last name printed on it.
X Factor supremo Cowell, 56, made remarks about her split from ex-boyfriend Lewis Hamilton after one singer chose to perform her song Run as part of the Six Chair Challenge.
Sitting next to Nicole, the X Factor boss then looked down and said: "Why do I think of Lewis Hamilton?
"Lewis added that his success on the track had acted as a "bandage" to his heartache.
Nicole previously told People magazine: "Sometimes people stay in relationships because they get complacent, because it's comfortable for them, because they don't want to be alone."It's a new chapter in my life.