Tim McGraw collapsed on stage at his Dublin concert. The singer has said that it may have been to due his extreme workout habits. His wife, Faith Hill, says he collapsed due to dehydration. McGraw’s brutal workout regime started when he decided to go alcohol-free and focus on his health. Tim McGraw works out twice a day, usually doing CrossFit. The 50-year-old singer collapsed on stage and has admitted he may need to slow down on his exercise habits. Fans in the past have shown concern for the singer for being too skinny. The singer also has a strict diet.