Miley Cyrus and Taylor Swift are performing Swift's song "15" together at Sunday's Grammys.

"The lyrics are very inspiring," Cyrus said Tuesday on Ryan Seacrest's KIIS-FM radio show. "A lot of girls are inspired by us, so this song is us giving our advice... This song is pretty perfect for the Grammys."
Swift said the song is about "all you think you know at 15" and "all these things that you learn.

"I am just really glad I was able to put into words all the things that happened that year," she said.

Added Cyrus, "You can be touring the world with the Jonas Brothers, or you can be in high school.. I think you're going through the same things.
"This song shows how the only things you're left with is your best friend and a learning experience," she said.

The Grammys has just lost another viewer.