Singer Katy Perry released two new singles this week, including her song "Roar” and her duet with John Mayer, "Who You Love."

Katy Perry and John Mayer Duet: There’s a ‘Love Giggle’ at the End
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Perry opened up about the song to SiriusXM Hits 1, explaining the origin of her giggle at the end of the track. "I think that's just a love giggle," Perry explained. "It's like the ones that Mariah Carey had in 1990 and stuff like that… yeah, I think I was going for that, I think I was just so happy, I love that song."

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The two singers have been dating on and off since last summer. While Mayer confirmed a breakup back in April, Perry told Vogue in June that she still had feelings for her ex, which prompted a reunion.

Perry’s album “Prism” will hit stores in October. Check out Katy's promo for the 2013 MTV Music Video Awards!

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