She's debating between Birthday and International Smile, but seemed to be leaning towards the true smash.

@ her not debating the true summer smash, Walking on Air.

omg new single !111!!

Ikr.

You gave me a heart attack

I use.

But how does this confirm it's the new single?

Good try, bro.

Katy knows better than to release that song.

omg I nearly died international smile is awful

WOA please Katy

I was ready for a meltdown

"Legendary Lovers" deserves to follow "Dark Horse" considering it fits Egyptian theme, make it a second installment of "Dark Horse" video or sequel per se.

Let "Birthday" smash in the summer.

In Before the close... Bye international smile

International Smile is the best song on the album!

Now, my son, you are reaching for the stars.