Looks like Lance Armstrong will be subject to another round of questioning. Some of his critics have wondered whether his cancer treatments enhanced his performance as a cyclist, a claim he has repeatedly dismissed. But at last night's Grammy awards, Melissa Etheridge, who is undergoing treatment for breast cancer, gave a rousing, spirited performance in tribute to Janis Joplin, certainly besting much of he "competition," mainly the tentative "Across the Universe," performed by a group of nervous, under-rehearsed all stars. So either cancer treatment does indeed enhance performance, or Melissa, like Lance, just came in better prepared.