American Idols at the ACMs: Carrie Underwood to Duet with Steven Tyler
04/03/2011 AT 06:45 PM EDT
Current Idol judge Steven Tyler is expected to join former Idol winner – and country superstar Carrie Underwood – at the awards show, PEOPLE has learned.
According to a source, the pair will sing a duet.
The ACMs will air live on CBS starting at 8 p.m. ET.