After LCD Soundsystem split up in 2011 Nancy Whang was at a loose end, so she hooked up with labelmate John Maclean, who she'd done vocals for before (most notably on 2008s Happy House), and turned The Juan Maclean into a duo.
She really adds to his music. While he'd done some good songs, 2014s In a Dream was a huge improvement on his previous album.