Karen Gwee

The singer steps away from the dance-pop of his debut Ratchetand towards sincere lo-fi. He's made a video for the new song "90's Kids" off a new album, Revelations, out in November.

Clarkson makes a bold-but-restrained return with the first single off her new album, Meaning of Life, which drops October 27.

As teens, the twins always played music together. Since then, their careers have led them in different, parallel directions. We asked each twin to share thoughts and memories about her sister's work.