Oops, she did it again. Britney Spears had a turbulent downward spiral from 2006 to 2008 throughout her whirlwind custody battle with ex-husband Kevin Federline, leading to her infamous head-shaving moment that became the buzz cut heard around the world. After reaching rock bottom, Spears climbed back, releasing her sixth chart-topping album, "Circus," which landed her a handful of MTV Video Music Awards. She continued to produce music, broke out of her controversial conservatorship with her father, and remarried. The release of her duet "Hold Me Closer" with Elton John (a remix of his hit "Tiny Dancer"), which marked the pop icon's first single in six years, seems to be another leap toward cementing Spears' comeback, with the song snatching the top spot on music charts worldwide mere hours after its release.
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