Katy Perry Dances to ‘Bad Blood’ as She Watches Taylor Swift ‘Shine’ at Eras Tour in Sydney

The ‘American Idol’ judge sang along to her ‘old friend’ Taylor while she performed the track that was rumored to be about their past feud. 

The ‘American Idol’ judge sang along to her ‘old friend’ Taylor while she performed the track that was rumored to be about their past feud.