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Former BFFs Paris Hilton and Nicole Richie both proclaimed their Britney love, with Nicole going above and beyond, showing off some of her pre-concert dance moves to the pop princess' iconic "I Am a Slave 4 U," in the following video, along with the message: "In honor of my queen, @BritneySpears - Can't wait to dance tonight!"
Paris tweeted, "Loves it! @britneyspears performing @rihanna's song S&M! Her outfits are amazing! Who did the costume design for her tour? Love!- Paris."
Hilton's sister Nicky joined in with: "@britneyspears show was amazing! She looked and sounded beautiful! Great concert!"
Kim Kardashian wrote, "Seriously u guys, tonight @britneyspears just had the best concert ever! She killed it in LA! Proud of u doll ;-) must see concert!" She also added the following nod to her fiance, "I'm a slave for you... @KrisHumphries."