WW, the company formerly known as Weight Watchers, craters on disappointing earnings. Can WW investor and spokesperson Oprah Winfrey help right the ship? Motley Fool analyst Ron Gross tackles that question, digs into better-than-expected earnings from Best Buy, and talks about the latest from biotech company, CRISPR.   Thanks to Airbnb for supporting MarketFoolery. Go to airbnb.com/fool and start hosting you’ll receive a $100 Amazon Gift Card if you generate $500 in booking value by May 30. Terms and conditions apply.