We all knew Kermit the Frog and Miss Piggy were hitting the 2012 Oscars red carpet, but what most weren’t expecting was a surprise duet. But it wasn’t between these two ‘Muppet’ love birds. Instead, Kermit joined up with ‘Glee’s’ Darren Criss for a stirring rendition of ‘Rainbow Connection.’

E! Online teased us all a little bit earlier with a sneak peak of their performance, but we were totally caught off guard by how adorable it was.

The duo stood in front of the Hollywood Roosevelt Hotel Sunday — Criss strumming away on his guitar and Kermit harmonizing in that high-pitched puppet voice we love so much. This performance celebrated the Oscar nomination for the song ‘Man or Muppets’ from ‘The Muppets’ movie.

[E! Online]