"Water Under The Bridge," a swelling bubble of soft rock, sits exactly in the middle of Adele's new album 25. It's co-written and produced by Greg Kurstin, who has also worked extensively with Katy Perry, Kelly Clarkson, and P!nk. Adele performed the track yesterday on Fallon. The singer also sat down for an interview, which prompted her host to attempt to an English accent. Watch that below.