Justice may be blind, but does she have an ear for music? That's the question a scientist and spare-time songwriter is asking in federal court, where he is suing Julio Iglesias.

Henry Chia says the singer's hit "Hey" copied a tune Chia wrote in 1978 called "Es," Spanish for "it is."U.S. District Judge John F. Keenan, who is hearing the case without a jury, listened this week to various versions of the songs.

First Chia performed his song on a piano. Later, lawyers played Iglesias' 1980 recording of "Hey." Similarities in the two love songs were apparent.

Hearing the old recording, Iglesias smiled, cringed and hid his face.

"I was very young when I sang that," he said later.

Chia, who taught metallurgy at Georgia Tech and now lives in Selma, Ala., is seeking profits from the song. He claims "Es" was rejected for use by Iglesias but later copied.

Iglesias says "Hey" was written by two Italian songwriters.