Confessing her deep devoted fandom to all things Paramore, Moretz said of Williams, "She's amazing." Moretz and host Grimmy performed a karaoke duet version of the band's song "Still Into You." But before they got around to singing, Moretz confessed,"[Williams] has a very difficult voice to sing along with."

That might explain the two false starts before she really gets into the song. It's not exactly the best, ahem, performance, but you can tell Moretz is having a blast singing along with "Still Into You." Watch it - here.

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