The NEW YORK POST is reporting the "Nothing Compares 2 U" singer SINEAD O'CONNOR is dead at the age of 56. There are no details released yet on the cause of death, but the Irish songstress lost her 17-year-old son in JANUARY of this year to suicide (NET NEWS 1/10). She was hospitalized shortly after. Her management team later released a statement saying that she would be canceling all of her shows for the rest of the year.The singer struggled publicly with her grief on