A week after Nick gushed about his feelings for Kate in Complex magazine, the seemingly smitten pair were spotted "whispering in one another's ear" during much of the DirecTV pre-Super Bowl party at Pier 70 in San Francisco on Feb. 6, a spy tells the New York Post.
The snitch added that Nick and Kate left together, fueling rumors that they're romantically involved.
Reports of a relationship between the 36-year-old actress and 23-year-old singer began appearing last year after they hit Disney World together. They were spotted enjoying one another's company in different cities in subsequent weeks.
Although he avoided specifying the exact nature of their relationship, Nick told Complex he thinks Kate is "amazing."