Miley Cyrus and Taylor Swift to perform duet at Grammys

Miley Cyrus and Taylor Swift will be performing a duet of Swift's song "Fifteen" at the Grammy Awards on Sunday.

According to Swift, "It's a song I wrote about freshman year of high school. It was the last year of my life I thought I knew everything. I had my first boyfriend when I was 15. I'm glad I was able to put it into words."

Cyrus added, "The lyrics are very inspiring. A lot of girls are inspired by us, so this song is us giving our advice."

Source: MTV.