Back in 2000, Emmylou Harris guested on Ryan Adams’ studio album Heartbreaker. Last night she performed in Los Angeles at the El Rey Theatre and Adams served as a surprise guest opener. He delivered a set of acoustic material like “Blue Hotel” and “Everybody Knows,” as well as some new tunes that may well appear on his next studio album. Harris also joined Adams for “Oh My Sweet Carolina” from Heartbreaker. Adams is working on his first studio album since 2008 with producer Glyn Johns.

Stop by the video blog for a look at the duet and an additional song from Adams’ set.