Taylor Swift once dubbed fellow pop star Selena Gomez 'the closest thing to a sister'.
But the 6-year-long friendship has crumpled after Selena's decision to reunite with ex-boyfriend, troubled teen Justin Bieber.
Swift made her disapproval of her best friend's decison clear, owing to Bieber's recent legal troubles and hard-partying reputation.
And an entertainment website revealed that the news of Selena and Bieber spending the past weekend together was the final straw for Taylor - who is 'disgusted' by her former pal's decision.
