Watching through it now and:
How is What Makes You Beautiful only one space higher than PILLOWTALK

Gangnam Style is really low

Teenage Dream #77

Didn't think it would be up this high
Hopefully Stiches makes 52 Weeks

Roar is kind of low

.
I had no idea Shut Up And Dance had made past a year on the chart

Thought California Gurls would've made Top 30 but

E.T. being one space lower than Hello

Ugh at 25

Sexy and I Know it?

I could've sworn Radioactive would've been Top 10 instead of 24 since it has the longest run

The Hills was that big @#20?

Dark Horse one spot above Shake It Off

for the hard work though