Ooooooh, Perezcious readers! Nothing we love more than musicians popping on stage to join in for a performance!
There is simply no denying that this performance was out of this world moving! The song is AH-Mazingly emotional, and these ladiez brought it to a whole other level.
We certainly hope they all have plans to work together soon because that's exactly what they've got us wanting!
And it sure sounds like Tegan and Sara are basking in the night as they tweeted:
— Tegan and Sara (@teganandsara) August 4, 2013
[Image via Adriana M. Barraza/Brian To/WENN.]