Jenny Douglas and Joseph Williams of Toto at Denver Day of Rock, May 26, 2012

Jenny Douglas and Joseph Williams of Toto at Denver Day of Rock, May 26, 2012

Singers Jenny Douglas and Joseph Williams of Toto turned the band’s massive hit “Hold the Line” into a powerful duet at Denver Day of Rock, May 26, 2012. (Daniel J. Schneider)

Singers Jenny Douglas and Joseph Williams of Toto turned the band’s massive hit “Hold the Line” into a powerful duet at Denver Day of Rock, May 26, 2012. (Daniel J. Schneider)