The 36-year-old singer was enjoying a quick getaway with a few of her close friends in Venice, reported Hello! magazine.
Scherzinger and her former beau Lewis, 30, had been on an on-and-off relationship for seven years and it was confirmed last month that the pair had split for a final time.
"The split has been devastating for Nicole. She feels the only way she can move on is by putting distance between her and Lewis.
"While their split was amicable, she and those around her feel it's not healthy for them to remain friends," a source said.