During their headlining performance at Leeds Festival over the weekend, Paramore brought frontwoman Hayley Williams’ younger sister Erica onstage for “Ain’t It Fun.” You can watch fan-shot footage of the full performance with Erica below. Check it out, and let us know how you think they did.

If you missed it, watch the band’s full Reading Festival set. Paramore are close to wrapping up their Monumentour with Fall Out Boy. Check out the remaining dates.