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Hayley Williams Brings Out Her Sister to Perform "Ain't It Fun" at Leeds Festival 2014
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgFb-f9qj2mP56Uy1uCGqtjLBC6fIXZdpWB9PRKXUXOB33AB_wlG5Pp00tjkjZKaGDghyY3c1TzYnZqD32eLL5YbmVnIwbPEcK-wotkNR-e7LWhskKP7BKgrrXaDuKrzyOnt_VMecpmB0M/s200/12085_10150328647444963_1888906551_n.jpg)
The vocalist's sibling joined the band during their set closer, "Ain't It Fun."
Hayley said earlier during Paramore's set: "Today has been a great day. I got to meet an idol - Brody Dalle and watch Jimmy Eat World with my sister, who has come to England for the first time."