This song sold alone 1 million + video with 200,000,000 views. When Funeral & Disease
TIHWD had literally 0 promo
on the other hand
Quote:
On October 22, 2013, Perry first performed "Unconditionally" at the iHeartRadio Theater in Los Angeles, California. Perry also performed the song on the Australian version of The X Factor on October 28, 2013 and also performed it on the Australian breakfast program Sunrise the following day. On November 10, 2013, she performed "Unconditionally" at the 2013 MTV Europe Music Awards. She also opened the American Music Awards of 2013 on November 24, 2013. On December 5, 2013, Perry performed the song on the Italian X Factor. On December 13, 2013, Perry also performed the song on The Voice of Germany together with four contestants of the show. On December 14, 2013, Perry performed "Unconditionally" at the NRJ Music Awards 2014. She also performed "Unconditionally" on the season 10 finale of The X Factor (UK) on December 15, 2013. Perry performed a stripped down version of the song on the December 20, 2013 episodes of The Ellen Degeneres Show and Alan Carr: Chatty Man.
Literally everyone remembers this. It was a defining moment of her career.
It's moments like these when you know that an artist really is as big/even bigger than ATRL says they are. Meanwhile ATRL overhypes/exaggerates the relevancy of so many artists...
This Is How We Do gets more streams per week than all the fan-uploaded Katy Superbowl performances do combined, and thus TIHWD is more remembered.
If she had performed This Is How We Do at the Super Bowl it would have been far more iconic, sent the song to #1 and pushed PRISM to 3x Platinum in the US.
Here for it tbh. Buzz single unless it smashes. 
