Even now, she said, she still has positive feelings about the singer's loved ones.
"I loved his family. Still do," she told Howard Stern during a visit to his XM radio show. "Love his family."
Blunt, 32, was involved with Bublé, 40, from 2005 to 2008. Rumors of infidelity on the singer's part percolated after their split, though the actress demurred when Stern mentioned it. She also laughed off his insinuation that she and her ex were a perfect match.
"I don't know if i was perfect with him," she responded, "but we had a good time!"
Bublé married Luisana Lopilato in 2011, and they have a son, Noah, 2, and a baby on the way.