Source:http://www.celebutopia.net/forum/showthread.php/britney-spears-lights-tree-stage-light-angels-holiday-97024.html
http://www.celebutopia.net/forum/showthread.php/britney-spears-arrives-light-angels-christmas-tree-lighting-97035.html
Source:http://www.celebutopia.net/forum/showthread.php/britney-spears-celebrates-her-27th-birthday-party-tenjune-96845.html
http://www.celebutopia.net/forum/showthread.php/britney-spears-circus-album-release-and-27th-birthday-96825.html
Source:http://www.celebutopia.net/forum/showthread.php/britney-spears-76th-rockefeller-center-christmas-tree-lighting-96770.html
Britney Spears – Circus
 
Source:http://www.celebutopia.net/forum/showthread.php/britney-spears-and-sons-leaving-big-apple-circus-96732.html
Source:http://www.hotcelebshome.com/britney-spears-performs-at-star-academy-in-paris/
Source:http://www.celebutopia.net/forum/showthread.php/britney-spears-performs-abcs-good-morning-america-new-96695.html