"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:

William James Adams, Jr. (born March 15, 1975), better known by his stage name will.i.am ("will I am") is an American rapper, musician, songwriter, singer, entrepreneur, actor, DJ and producer.

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.