Credit: Ethan Miller/Getty Images; Kevork Djansezian/Getty Images

A collaboration between two of the most popular American Idol contestants ever might have finally arrived.

Kelly Clarkson and Chris Daughtry supposedly linked up to record “One More Yesterday” in 2011, but it only recently found its way online, according to mjsbigblog.

The duet sounds like vintage Daughtry and Clarkson’s earlier music (see “Behind These Hazel Eyes”), and each trade heavy vocal punches, harmonizing on the chorus.

Both Clarkson and Daughtry performed for American Idol‘s series finale on April 7.

Hear the duet below.