In my opinion, it's We Found Love so far, and I don't even stan Rih.

Wide Awake by Katy Perry, which is also the best song of all time

XO

Wow very tru. totally 4got.

The Edge of Glory.

WFL for sure.

Loreen - Euphoria

"Dancing On My Own," by a fairly wide margin, followed by "Teenage Dream."

Teenage Dream

WFL is godly, but Diamonds is better

Birthday - Katy Perry.

Spelling we found love incorrectly is an honest mistake and I forgive you...

If I can think of 5 at the moment I'd say:

1. Someone like you
2. We found love
3. royal
4. Sorry
5. Wide awake

If one of those isn't considered pop (royal) then I think Thinking out loud

Came here to say We Found Love.

See i wanted to say teenage dream and birthday but I didn't want to include two katy songs in the top 5 and seem subjective.

teenage dream would be #6 or 7 for me.

We Found Love.

For me it would be State of Grace. Never got tired of that song.

We Found Love, followed by Euphoria by Loreen.

Birthday - Katy Perry

Teenage Dream, Baby Love (Petite Meller), Pumped Up Kicks, Run Away With Me, We Are Never Ever Getting Back Together.