Fans of Canadian pop star Justin Bieber scream as they gather outside the hotel in which Bieber is staying in Mexico City, Tuesday, Nov. 19, 2013. Mexico's president has denied a tweet by Bieber saying the singer met with the president and his family prior to Monday's night show. It was the latest sour note in Bieber's controversy-filled Latin American tour. A fan of Canadian pop star Justin Bieber wearing a headband with an "I love Justin Bieber" message, flashes two thumbs up, outside the hotel in which Bieber is staying in Mexico City, Tuesday, Nov. 19, 2013. A young woman holds a photo of Canadian pop star Justin Bieber as she stands outside the hotel in which he is staying in Mexico City, Tuesday, Nov. 19, 2013. A street vendor hawks Canadian pop star Justin Bieber paraphernalia outside the hotel in which Bieber is staying in Mexico City, Tuesday, Nov. 19, 2013. Canada's pop star Justin Bieber performs in concert during his Believe world tour in Asuncion, Paraguay, Wednesday, Nov. 6, 2013. AP Photo/Jorge Saenz MEXICO CITY (AP) - Mexico's president has denied a tweet by Justin Bieber saying the singer met with the president and his family prior to a show. President Enrique Pena Nieto's office put out a tweet late Monday that read "@Presidenciamx denies meeting between President @EPN with the singer @justinbieber." That was a response to a tweet from Bieber's official account saying "just met some amazing mexican beliebers and the presidente of mexico and his familia." Apparently, Bieber was confused about whether the president was there or not. Early Tuesday, Bieber wrote in a tweet, "correction. I met the presidente's family and all their friends in the private meet and greet with all their security. They were very nice. The 19-year-old pop sensation faces two criminal complaints and demands for refunds in Argentina, in addition to trouble with police for allegedly spraying graffiti in Brazil. Bieber angered Argentines by abandoning a concert after less than an hour and not showing up for a photo-op that some fans paid hundreds of dollars extra for. The singer's manager, Scooter Braun, said Bieber came down with food poisoning after a concert Saturday, and despite eight hours of intravenous fluids, insisted on trying to do Sunday's concert against doctors' advice. One Argentine lawyer is accusing Bieber of sending bodyguards to attack a photographer outside a Buenos Aires nightclub. Another accuses him of defiling the national symbol by dragging two Argentine flags off stage with his feet and a microphone stand before 45,000 "beliebers" during the first of two concerts in River Plate stadium.