100 most popular songs of the decade (according to Billboard)

Here is a link to Billboard.com's Hot 100 of the decade. They basically list which songs were played the most from 2000-2009. The biggest surprises are Apologize by One Republic & Timbaland was put higher on the charts that Outkast Hey Ya and the most popular Usher according to this list is U got it bad. I don't believe either one of those but check out the rest list!

Link- http://www.billboard.com/#/charts-decade-end/hot-100-songs?year=2009&begin=1&order=position