Read our entry below on why Adele was our Greatest Pop Star of 2011 - with our '11 Honorable Mention runner-ups, Rookie of the Year and Comeback of the Year pop stars at the bottom - and find the ...

Adele’s annus mirabilis ended on a low note: The singer cancelled the final dates of her tour as she battled a vocal-cord hemorrhage and did not perform publicly for the rest of 2011.