"It's a Good Day" is a popular

Popular music

Popular music belongs to any of a number of musical genres "having wide appeal" and is typically distributed to large audiences through the music industry. It stands in contrast to both art music and traditional music, which are typically disseminated academically or orally to smaller, local...

 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 by Peggy Lee

Peggy Lee

Peggy Lee was an American jazz and popular music singer, songwriter, composer, and actress in a career spanning six decades. From her beginning as a vocalist on local radio to singing with Benny Goodman's big band, she forged a sophisticated persona, evolving into a multi-faceted artist and...

 and Dave Barbour

Dave Barbour

Dave Barbour was an American musician. He was a jazz banjoist and guitarist, a pop songwriter, an actor, and the husband of Peggy Lee for nine years....

 and published in 1947

1947 in music

-Events:*August 7 – Carlo Bergonzi makes his professional debut as Schaunard in La Bohème at the Arena Argentina in Catania.*October – Enrico De Angelis leaves Quartetto Cetra to join the army...

.

The song has been recorded by many singers since its introduction, most recently by Susie Arioli

Susie Arioli

- Biography :Arioli had been singing in jazz clubs in Montreal when she met guitar player Jordan Officer at a jam led by Stephen Barry. Together they started the Susie Arioli Band. Their first big opportunity came in 1998 when after a successful outdoor show they were asked by the Montreal...

. The song was also recorded by legendary Judy Garland

Judy Garland

Judy Garland was an American actress and singer. Through a career that spanned 45 of her 47 years and for her renowned contralto voice, she attained international stardom as an actress in musical and dramatic roles, as a recording artist and on the concert stage...

 on a recording of The Judy Garland Show

The Judy Garland Show

The Judy Garland Show is an American musical variety television series that aired on CBS on Sunday nights during the 1963-1964 television season. Despite a sometimes stormy relationship with Judy Garland, CBS had found success with several television specials featuring the star...

. The most popular version of the song is probably Perry Como

Perry Como

Pierino Ronald "Perry" Como was an American singer and television personality. During a career spanning more than half a century he recorded exclusively for the RCA Victor label after signing with them in 1943. "Mr...

's, released on his 1955 RCA Victor

RCA Records

RCA Records is one of the flagship labels of Sony Music Entertainment. The RCA initials stand for Radio Corporation of America , which was the parent corporation from 1929 to 1985 and a partner from 1985 to 1986.RCA's Canadian unit is Sony's oldest label...

 album So Smooth

So Smooth

So Smooth was Perry Como's first RCA Victor 12" long-play album, recorded and originally released in 1955. This was also Perry's first album recorded at Webster Hall in New York City, and his first album with the Ray Charles Singers who would support him generally throughout the remainder of his...

.

The song served as the background score during the opening credits of Indian film director Rajkumar Gupta's 2008 debut film Aamir.