Enrique Iglesias and Pitbull have announced dates for their fall co-headlining tour, with a little help. The Latin superstars enlisted some of their biggest fans on Twitter to help announce each date by tweeting their excitement for the tour, in exchange for a follow-back and private direct-message from Iglesias or Pitbull with details of the next gig. “Thank you sooooooo much!!!!!! #hardworkpaysoff” tweeted @Elfan414, who announced the Oct. 3 show at the Allstate Arena in Rosemont, Ill.The social-media activity made the tour’s hashtag #EnriquePitbullTour a top trending topic both in the U.S. and worldwide within minutes.The 15-city U.S. tour, produced by AEG, kicks off Friday Sept. 12, in Newark, New Jersey, and will run through Saturday, Oct. 22, in Hollywood, Florida. Colombian singer J Balvin will join Pitbull and Iglesias as support on all dates, which Iglesias announced with Billboard’s Leila Cobo at last week’s Latin Conference in Miami.