11/21/2010 AT 12:10 PM ET
The singer, whose birthday is Tuesday, intends to show off her more adult side with a rendition of her single “Forgiveness and Love” at the 2010 American Music Awards on Sunday.
Justin Bieber also hopes to make a splash with his new single “Pray,” and will be putting on a huge number with a band and some surprise guests.
The show will broadcast live from the Nokia Theatre L.A. Live on Sunday at 8 p.m. ET on ABC.