Perry made the live television premiere performance of " Hot n Cold " on NBC 's '' Today '' on August 29 , 2008 . Perry performed the song live at the 2008 MTV Europe Music Awards in Liverpool , which she also hosted , on November 6 to close the show . The song was also performed as the opener at the 2008 YouTube Live event on November 22 , 2008 . Perry performed the song with Taylor Swift at the Staples Center show during the Fearless Tour on April 15 , 2010 . The song has been included in the setlists of Perry 's Hello Katy , California Dreams , and Prismatic World tours . During the California Dreams Tour , Perry performed a " magic trick " that involved her changing into 7 different outfits during the number . Perry performed the song on her The Prismatic World Tour in a slow jazz version with her dressing in a pink-catsuit with her dancers dressed in a similar way . It is also part of the setlist of Perry 's Witness : The Tour in a medley with " Last Friday Night ( T.G.I.F ) " , a song from her album '' Teenage Dream ''
2008 MTV Europe Music Awards
2008 MTV Europe Music Awards
Hot n Cold