Sydney celebrated her birthday with a space-themed bash in Los AngelesSYDNEY SPEARS Sydney Sweeney shows off stunning figure as she pays homage to Britney Spears in silver minidressACTRESS Sydney Sweeney looks out of this world on turning 28. She twinkled in a silver star-covered minidress, which Britney Spears wore on one of the covers of her 2008 album Circus. 3 Sydney Sweeney paid homage to Britney Spears as she celebrated her 28th birthday Credit: Cibelle Levi3 Sydney wore a silver star-covered minidress, which Britney Spears wore on one of the covers of her 2008 album CircusSydney has previously been backed by fans to play the Toxic hitmaker in the big screen adaptation of her autobiography The Woman In Me. The actress also celebrated her birthday with a trip to Lake Powell on the Utah and Arizona border with Scooter reportedly in attendance. Sydney Sweeney, Amanda Seyfried, Brandon Sklena star in thriller novel adaptation The Housemaid