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" Taylor Swift and Demi Lovato on the same track? Only in our pop music daydreams\u2014until now! A new mashup of Tay&amp;#039;s explosive hit &amp;quot;I Knew You Were Trouble&amp;quot; and Demi&amp;#039;s latest single &amp;quot;Heart Attack&amp;quot; hit the Web this week and we&amp;#039;re absolutely addicted. The two love-themed tunes sound awesome together. With overlapping catchy choruses and a killer beat, this mashup is perfect for your workout playlist, or getting ready for a night out! Listen to the mashup below and let us know what you think! Do you think Taylor and Demi would ever team up for a duet? Sound off in comments!      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.seventeen.com/celebrity/music/reviews/a20275/taylor-swift-demi-lovato-mashup/>