"Taylor swift what up," the singer wrote on Instagram Tuesday alongside a FaceTime selfie that featured himself talking with West and their shared manager Scooter Braun.
The caption is a clear reference to the ignited hostility between West and Swift that first started in 2009 when the outspoken rapper interrupted the pop star at the MTV Video Music Awards. Things got interesting again when West referenced Swift on his single "Famous" off his latest album The Life of Pablo which featured the lyrics, "I feel like me and Taylor might still have sex / Why? I made that [expletive] famous."
After Swift took aim at West at the 2016 Grammy Awards and her rep denied she gave permission to use the lyrics in the song, West's wife Kim Kardashian took to Snapchat in July to post a video of the "Bad Blood" singer giving her blessings to the song's content.
Battle lines have been drawn ever since with Bieber now being the latest celebrity to pick a side. Outside of sharing the same manager, Bieber may have pledged allegiance to Team Kanye due to his past high-profile relationship with Swift's close friend, Selena Gomez.
Bieber who has continually expressed his love for Gomez, is rumored to have not been on good terms with Swift following the breakup due to her rumored disapproval of the relationship. Reportedly, Swift refused to answer a question about Bieber at the 2013 Billboard Music Awards and stuck out her tongue after she viewed him kissing Gomez backstage.
Gomez previously addressed the Snapchat video and ongoing drama between West and Swift on Twitter writing, "There are more important things to talk about... Why can't people use their voice for something that [expletive] matters?"