Edit: I've decided we may as well make this the official "Bubblegum Bass" thread, since it's not merely excluded to the PC Music label.
So
PC Music are a relatively new label. The majority of their artists make music described as "bubblegum bass", which is essentially polished pop songs, that are kind of sped up and squeaky. An over-simplification I suppose, but some of the tracks just don't follow convention, so it's hard to describe.
A few linkys to help you delve:
PC Music
https://soundcloud.com/pcmus
PC Music's Twisted Electronic Pop: A User's Manual | The Pitch | Pitchfork