Lady Gaga rehearses gruelling dance routines in her latest green wig

By PAMELA OWEN Ever-changing: Lady Gaga is now sporting long green hair in preparation for her performance at MuchMusic's Video Awards She's known for her rigorous work ethic so it's no surprise that Lady Gaga was seen rehearsing for an upcoming performance once again.The superstar doesn't ever appear to stop and just days after she appeared on Paul O'Grady Live, she was perfecting her moves for