Britney Spears' Circus has restored her as a star attraction less than a year after a downward spiral of personal troubles threatened to end her career. The singer's sixth
studio album, released on her 27th birthday Dec. 2, sold 505,000 copies and is her fifth No. 1 debut on the Billboard 200 chart. Circus' totals, the seventh-highest of 2008, dwarf sales of Spears' 2007 Blackout, ...