Madonna and Beyonce appear to have their eyes locked on the Grammy stage, the Los Angeles Times reports, citing " two sources with knowledge of the plans".The two superstars are expected to be among the big surprise moments during next week’s ceremony. Late last year Beyonce pulled off one of the best-kept secrets in recent music history when she stealthily released her self-titled album without as much as a hint. The Grammys is where Beyonce will make her first televised performance in support of her new album - which shattered iTunes records upon its release in December - according to a source with knowledge of the matter, while Madonna is expected to pop up and lend guest vocals during a performance from one of the night’s nominees, an additional source confirmed. Performing at the Grammy Awards without being a nominee would not be something new for the Queen of Pop; Madonna appeared on the show in holographic form together with the Gori...