I’ve heard a few reviewers compare "Unconditionally" to “Teenage Dream”, so I’m ready for it to be the 2nd #1 single. Also, they said “Double Rainbow” is an empowerment anthem, so that can be the “Firework” of this era. “Dark Horse” can be the “E.T.” cause it has a mysterious beat + a rapper + it’ll be the promo single that gets promoted to be a full single. Than “This Is How We Do” can be the fun 5th single ala “Last Friday Night (T.G.I.F.)”. "Ghost" can be the "The One That Got Away", the single
that stops her from breaking Michael's record about a lost lover. "Walking On Air" can be the "Hummingbird Heartbeat" aka the obvious smash that goes unreleased (unless she wants to avenge that mistake by getting one of her biggest hits of her career

)
"Birthday" will be the "Peacock" of this era aka it will be annoying but it'll get a spot on the album sticker and everyone will want it to be a single but it'll remain unreleased.