Everyone has different tastes, but this is my list of the best Katy tracks and she should be focusing on making more stuff like the bolded ones.

(Starting from her first album)

Waking Up In Vegas
I Kissed A Girl
Thinking Of You
Hot N Cold
E.T.
Who Am I Living For?
Circle The Drain
Teenage Dream
Dressin' Up
Choose Your Battles
Legendary Lovers

Honorable mentions:
Dark Horse, Pearl, Uncle

I didn't lie.

Mess, a mod move this to the Base please.

I Kissed A Girl
Hot N Cold
Teenage Dream
Legendary Lovers

All those are great except Uncle.

i just like teenage dream [song]
only music i hear from her

Teenage Dream is her best song, so yes.

Legendary Lovers
Teenage Dream
Hot N Cold
Hummingbird Heartbeat.
By The Grace Of God

Top 3 from each of her albums:

This Is How We Do
Legendary Lovers
International Smile

The One That Got Away
Last Friday Night (T.G.I.F.)
California Gurls

If You Can Afford Me
Hot N Cold
Waking Up In Vegas

These are definitely among her best, yes!

Dressin' Up? That trash sounds like an unfinished demo, lmao.

Replace Purl with International Smole and you've got a deal.

Legendaey Lovers is her best track imo

Thinking Of You, Teenage Dream, Legendary Lovers are her trinity.

Her best songs are Thinking of You, I Kissed a Girl, and Teenage Dream.

Legendary Lovers, IKAG, Hot n Cold and E.T♡♡

Dressin Up is horrid

California Girls, Walking on Air, Last Friday Night & Wide Awake bop a tad too

No but I like em