horrific car fire accident on Nov. 12 that left him with third-degree burns on his face, chest, and hands.The 72-year-old was met with loud applause from the audience as he sat down to chat with the “Since U Been Gone” singer about his injuries.“You look great though,” Clarkson told Leno, to which he replied, “This is a brand-new face.”“It is, it’s unbelievable,” Leno continued.