"Quando, Quando, Quando" is an Italian pop song from 1962, in the bossa nova style, with music written by Tony Renis and lyrics by Alberto Testa. American entertainer Pat Boone, who recorded the song in 1962, is listed in some sources as the writer of its English-language lyrics, but other sources, including the Songwriters Hall of Fame, say veteran songwriter Ervin Drake was the lyricist.

The title translates as "When, When, When".

The song has been used and remixed by many artists and in many different arrangements. The most notable rendition in English was by pop singer Engelbert Humperdinck. In 2005, Michael Bublé performed the song as a duet with Nelly Furtado. There is an instrumental Latin version by Edgardo Cintron and The Tiempos Noventa Orchestra. The song was a 1962 Billboard Top 100 entry by Pat Boone.

Quando is the only Italian word normally retained in most English-language renditions of the song.

Pat Boone sang the starting piece in a good Italian accent but then carried on the rest of it in English, repeating every now and again some Italian words. The Italian words sung by Boone:

Michael Steven Bublé ( /ˈbuːbleɪ/; born 9 September 1975) is an Italian Canadian singer and actor. He has won several awards, including three Grammy Awards and multiple Juno Awards. His first album reached the top ten in Canada and the UK. He found a worldwide audience with his 2005 album It's Time, and his 2007 album Call Me Irresponsible which reached number one on the Canadian Albums Chart, the U.K. Albums Chart, the U.S. Billboard 200 albums chart, the Australian ARIA Albums Chart and several European charts. Bublé has sold more than 30 million albums worldwide.

Michael Bublé was born in the City of Burnaby, British Columbia, Canada to Lewis Bublé, a salmon fisherman, and Amber (née Santagà). He has two younger sisters, Crystal (an actress) and Brandee. He attended Seaforth Elementary School and Cariboo Hill Secondary School. According to an Oprah interview on 9 October 2009, Bublé dreamed of becoming a famous singer since age two. When he was a teenager, he slept with his Bible and prayed to become a singer. Bublé's interest in jazz music began around age five when his family played Bing Crosby's White Christmas album at Christmas time. The first time that his family noticed his singing talent was at Christmas time when Bublé was 13 years old, and they heard him powerfully sing the phrase "May your days be merry and bright" when the family was singing to the song "White Christmas" in a car ride.

Nelly Kim Furtado (born December 2, 1978) is a Canadian singer-songwriter, record producer and actress. Furtado first gained fame with her debut album, Whoa, Nelly!, and its single "I'm Like a Bird", which won a 2001 Juno Award for Single of the Year and a 2002 Grammy Award for Best Female Pop Vocal Performance. Her second studio album, Folklore, was released. It was less commercially successful in the US but produced three international singles: "Powerless (Say What You Want)", "Try", and "Força" (the theme of the 2004 European Football Championship). Her third studio album, Loose was her biggest success worldwide. It produced the number-one hits "Promiscuous", "Maneater", "Say It Right" and "All Good Things (Come to an End)". After a three-year break, she released her first full-length Spanish album, Mi Plan. For Mi Plan, Furtado received the Latin Grammy for Best Female Pop Vocal Album. Furtado's fourth English-language studio album, The Spirit Indestructible, is set for release on September 18, 2012.