It seems she's barefoot in the majority of her music videos so far. She has put out two own videos and a feature with Kaskade recently (see my other video postings) and she is in bare feet in all three of them (and even in the thumbnails of her own vids)! But I think she is criminally underrated, musically as well as feet-wise/here on wikiFeet!
Btw, I think she looks gorgeous with that blond hair!

Skylar Grey - Come Up For Air

Barefoot throughout. :-)

https://www.youtube.com/watch?v=ZmwhbJnV05I

(from 2016)

Skylar Grey - Final Warning

0:00
0:38
1:12

https://www.youtube.com/watch?v=ToOFtvvFGGo

(from 2013)

[MV] Skylar Grey - Room For Happiness [it's actually: Kaskade feat. Skylar Grey]

0:49
1:10
3:13
3:59 (best shots)

https://www.youtube.com/watch?v=seGSpyu1ZVU

(from 2011)

Cute old barefoot performance from Hayley!

Paramore - 101.3 KDWB Performance

https://www.youtube.com/watch?v=WkCEZCkiuLc

(from 2008 or before)

#barefootonstage

1:23 heels

feet here, and here https://www.youtube.com/watch?v=hMIskkCk3Hc

Let's enjoy it while it lasts.

https://www.youtube.com/watch?v=ts1LMyGkGmw

There are a lot of beautiful moment in this video, just check it out. Like at 5:27

...great scene from Little Fauss & Big Halsy (1970)