Material Girl reportedly lined up for prestigious musical slot on February 5
Singer's publicist Liz Rosenberg says singer 'would never do that'
Singer also posts video response to her hydrangeas incident at Venice Film Festival
Trial over trademark dispute will go ahead
Singer says she will be busy in the studio until the end of the year
Singer reveals details at screening of her new film 'W.E'
Jean Baptiste to help William Orbit on singer's latest
Pop icon also reportedly planning big world tour next year
Madonna was in the US paying tribute to her 99-year-old grandmother at the time
Former Smiths man calls Madge's vocal ability into question