By Piya Sinha-Roy LOS ANGELES (Reuters) - A star-studded crowd gathered to celebrate the 2013 Rock and Roll Hall of Fame inductees on Thursday, as Oprah Winfrey and Usher gathered to pay homage to the likes of Donna Summer, Quincy Jones, Randy Newman and Rush. Disco queen Summer, producer Jones and comedy-rock singer Newman were inducted along with Canadian progressive rock band Rush, blues guitarist Albert King, hip hop pioneers Public Enemy, rockers Heart and veteran producer Lou Adler. ...