Lionel Richie needed to sit down during his concert in St. Louis, Missouri, on Saturday before he checked himself into the hospital. In social media videos from the show, the 77-year-old singer motioned to his team to bring out a chair while performing his final song, “All Night Long,” at the Muny Amphitheater. The team member brought out the chair, which Richie sat on for the remainder of his show. According to the St. Louis American, Richie spoke about his dehydration issues and June hospitalization during the concert. “Some things have been happening on this tour that kind of shook me up a little bit, because I couldn’t figure out…