It was the highlight of the night for many Grammy Award viewers.
Miley Cyrus and Taylor Swift performed the song "Fifteen" together during the event, later presenting the Record of the Year award to Robert Plant and Alison Krauss for their collaboration on "Please Read The Letter."
The crowd went wild as these teen sensations rocked out, acoustic style. Take a look:
Click on the photos above for more close-ups of Miley Cyrus and Taylor Swift.