The Brief City officials said 10 people were arrested during this year's Lollapalooza. A total of 67 people were taken by ambulance to nearby hospitals. Lollapalooza ended with 10 arrests and 67 people taken to hospitals by ambulance over four days, according to the City of Chicago. Lollapalooza arrests and hospital totalsBy day, officials reported:Thursday: 4 arrests, 18 ambulance transportsFriday: 3 arrests, 22 ambulance transportsSaturday: 3 arrests, 16 ambulance transportsSunday: 0 arrests, 11 ambulance transportsThere were no ordinance violations or citations. In 2011, heavy rain turned Grant Park into a muddy mess, and organizers paid more than $1 million to repair the grounds.