Duet (noun)

1. A musical composition for two performers.
2. A performance by two people, especially singers or instrumentalists.

Origin:

From italian duetto, from duos ("two"), from latin duos.

Examples:

1. The duet between the two opera singers was breathtaking.
2. They sang a duet of "Summertime" and it was beautiful.
3. The pianist and violinist played a duet of Mozart's sonata.
4. The Duet was a beautiful performance by two dancers, they moved in perfect synchrony.
5. The couple performed a romantic duet on their wedding day.