Lionel Richie voluntarily admitted himself to the intensive care unit at a hospital in St. Louis, Missouri, on Saturday for medical testing. ^[1] Medical sources cited by TMZ suggested that Richie may have suffered from mild dehydration. ^[2] TMZ reported that the 77-year-old singer struggled to remain standing while performing his hit song 'All Night Long' at the Muny theater in St. Louis before seeking a seat. ^[3] The Hollywood Reporter stated that Richie's condition is currently stable according to a person from his production team. ^[4] TMZ reported that Richie is expected to be discharged from the hospital by Tuesday morning. ^[5] During the final part of his performance at The Muny in St. Louis, Richie asked his team for a chair to sit down while singing his hit song 'All night long'. ^[6] Sources cited by TMZ indicated that the 77-year-old artist entered the hospital as a precaution after having difficulty standing during a concert held that same night. ^[7] According to reports from People and TMZ, Richie voluntarily went to the hospital for follow-up tests and examinations after concluding his performance. ^[8] Medical teams are working under the main hypothesis that Richie is suffering from an acute case of dehydration. ^[9] This hospitalization is the second health warning for the musician in two months, following an incident in June where he canceled two concerts due to sudden dizziness on stage. ^[10] TMZ reported that medical professionals are considering that Richie may have suffered from mild dehydration. ^[11]