This was the year everyone went gaga for Lady Gaga.
Billboard's year-end music recaps are based on chart performance during the chart year that began with last year's Dec. 5 issue and ended with the Nov. 27, 2010, issue.
The year-end Top Artists list ranks the best-performing acts of the year derived from activity on two charts: the Billboard 200 albums tally and the Billboard Hot 100 singles list.
Lady Gaga Tickets
