Christina Aguilera: “Happy 30th birthday, Britney Spears!!!”December 3, 2011Happy 30th birthday @britneyspears!!!Source: @TheRealXtina Previous Post Cee-Lo: "The Voice," Christina Aguilera on Shade 45's "Sway In The Morning" Show Next Post Christina Aguilera and Blake Shelton On The Set Of "The Voice" Season 2 Pic
