The 54-year-old "Material Girl" singer, who performed 88 concerts on her recent international trek, confessed that the stress made her emotional, reported Contactmusic.
"I'm a human being like everybody else, so I would have my nights, my bad nights and I would cry and I would say, 'I don't want to do this," she said.
Her 12-year-old son, Rocco, also joined on the tour as a dancer, which in a way gave her a comfort level.
"I was thrilled to see him every night. He gave me a boost of energy," she said.