WATCH: Miley Cyrus fights back tears during Wrecking Ball performanceSharing an old photo of Britney Spears wearing a shirt reading “Dump him”, Miley bluntly captioned the post “already did Brit”.While she didn’t take aim at her ex by name, fans are convinced she’s referring to her former Hunger Games beau Liam Hemsworth who she dated on and off for a decade, or singer Cody Simpson, who she was briefly in a relationship with following her split from Liam.Miley Cyrus has taken a savage swipe at