Newly single Nicole Kidman returned to The Tonight Show on Monday (March 2), where she reunited with host Jimmy Fallon, the man she once confessed to having a “crush” on. The Oscar-winning actress, who finalized her divorce from Keith Urban in September, appeared on the show to promote her upcoming Prime Video series Scarpetta, which premieres on March 11. Kidman was excited to be back on the late-night show, reminding Fallon it’s been “four years” since they last saw each other. “You’ve been busy!” Fallon replied. “I’m so happy to be back,” Kidman said. Fallon quipped, “I want you to come back all the time. I want you to…