By Alex West Madonna’s Christmas celebration on stage didn’t go as planned when her dancer fell over sitting on Santa’s lap. The pop singer brought out Mr. Clause as part of her performance. He wore a full-on red and white suit complete with the iconic hat and beard as he sat on a stool. Madonna briefly sat by his side before standing up to continue her choreography. Wearing a tight black and silver dress, she looked out over the crowd, completely oblivious to the chaos that began rumbling behind her. One of her dancers approached Santa to sit on and straddle his lap. When the dancer climbed o…