I've really expanded in terms of artists, bands and miscellaneous songs I like. Here's an updated list:

Bands

Rend Collective

Imagine Dragons

Coldplay

Little Mix

Queen

Artists

Owl City

Taylor Swift

Katy Perry

Lindsey Stirling

Misc. Songs

Mr Blue Sky

Walking on Sunshine

Stronger

Others (I can't be bothered typing out the long list)