Pia Toscano Sings Celine Dion’s ‘All by Myself’ on ‘American Idol,’ Leaves J. Lo Speechless

'American Idol' contestant Pia Toscano certainly has a flair for the dramatic. Tonight, when she sang Celine Dion's 'All By Myself' in her room-filling and towering voice, the raven-haired vocalist knocked 'em dead.

Toscano, whose signature move is to belt out her biggest notes at the end of her songs, left Jennifer Lopez speechless. J. Lo told the young starlet that she topped last week's performance, where she tackled the Pretenders and won America over by doing so.

Randy Jackson said it best when he referenced the "Mariahs, Whitneys, Celines," saying that ambitious singers should be careful when attempting to emulate those divas or sing their songs. "Celine can slay these songs, but you have that quality," Jackson said. "These notes that you hit? You hit 'em dead on, without even thinking about them." He also called her performance "hot, dope, cool."

Steven Tyler told Toscano that tonight's soaring performance was "the sum total of all the work you've done." Mamma Mia, the judges love Pia!

Watch Pia Toscano Sing Celine Dion's 'All By Myself'