Back on-again couple Justin Timberlake and Jessica Biel have been on a whirlwind trip. The duo was spotted in Martha’s Vineyard last week before ferrying to the Hamptons Friday, according to spies. With Hurricane Irene threatening to dampen the mood, it seems they didn’t stay long. After being seen at a Westhampton deli Saturday, the two high-tailed it out of the country on a jet. Sunday morning, spies north of the border say that Timberlake and Biel were brunching at Toronto hipster haunt Swan. “They were there for about 45 minutes,” said a source. “They were in baseball caps and sunglasses, but everyone recognized them. Everyone acted very Canadian and left them alone.” Other sources said that last week Biel was telling friends that she and “her boyfriend” were “going on a vacation.” The couple broke off their four-year relationship in March, but then went to see a play, “Sleep No More,” together in Chelsea this month. Biel’s rep had no comment. Timberlake’s rep did not return calls.