Taylor Swift's surprise guest bonanza continues.
This time the lucky star to enjoy a new wave of publicity is Andy Grammer, who performed his smash hit ode to monogamy "Honey I'm Good" at Taylor's Chicago stop of her 1989 Tour.
It's not the first time the musical pair have shared a stage, either. Grammer joined Swift for a live duet back in 2011, as well:
Swift was later joined on stage by Serayah, who appeared in the Bad Blood video as Dilemma.
— Taylor Swift (@taylorswift13) July 19, 2015
Australian Swifties should probably start getting excited for who might pop up at their December shows, considering both Ed Sheeran and Sam Smith will be in town at the same time as Taylor!