"I Wonder Why" is a doo-wop

Doo-wop

The name Doo-wop is given to a style of vocal-based rhythm and blues music that developed in African American communities in the 1940s and achieved mainstream popularity in the 1950s and early 1960s. It emerged from New York, Philadelphia, Chicago, Baltimore, Newark, Pittsburgh, Cincinnati and...

 song

Song

In music, a song is a composition for voice or voices, performed by singing.A song may be accompanied by musical instruments, or it may be unaccompanied, as in the case of a cappella songs...

, written

Songwriter

A songwriter is an individual who writes both the lyrics and music to a song. Someone who solely writes lyrics may be called a lyricist, and someone who only writes music may be called a composer...

 by Melvin Anderson (lyrics

Lyrics

Lyrics are a set of words that make up a song. The writer of lyrics is a lyricist or lyrist. The meaning of lyrics can either be explicit or implicit. Some lyrics are abstract, almost unintelligible, and, in such cases, their explication emphasizes form, articulation, meter, and symmetry of...

) and Ricardo Weeks, and first recorded

Sound recording and reproduction

Sound recording and reproduction is an electrical or mechanical inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects. The two main classes of sound recording technology are analog recording and digital recording...

 by Dion and the Belmonts

Dion and the Belmonts

Dion and the Belmonts was a leading American vocal group of the late 1950s. The group formed when Dion DiMucci, lead singer , joined The Belmonts - Carlo Mastrangelo, baritone , Freddie Milano, second tenor , and Angelo D'Aleo, first tenor , in late 1957.-History:After an unsuccessful first single,...

 in 1958. It is sung from the point of view of a man telling to his girlfriend that he neither knows nor ultimately cares to know the reasons for his love for said other. The song was used in the film A Bronx Tale

A Bronx Tale

A Bronx Tale is a 1993 American crime drama film set in The Bronx during the turbulent era of the 1960s. It was the directorial debut of Robert De Niro, and follows a young Italian-American teenager as his path in life is guided by two father figures, played by De Niro and Chazz Palminteri...

, in the pilot episode of the television series The Sopranos

The Sopranos

The Sopranos is an American television drama series created by David Chase that revolves around the New Jersey-based Italian-American mobster Tony Soprano and the difficulties he faces as he tries to balance the often conflicting requirements of his home life and the criminal organization he heads...

, and in John Carpenter's film adaption of Stephen King's "Christine". A cover was sung by Nicolas Cage in Peggy Sue Got Married

Peggy Sue Got Married

Peggy Sue Got Married is a 1986 American comedy-drama film directed by Francis Ford Coppola and starring Kathleen Turner as a woman on the verge of a divorce, who finds herself transported back to the days of her senior year in high school...

.