"Think Twice" is a song written by Andy Hill and Peter Sinfield, famously recorded by Canadian singer Celine Dion. Production on the track was by Christopher Neil and Aldo Nova. The song is rock-influenced and features a guitar solo, one of only a few of Dion's songs to do so, performed by Nova. Lyrically, the song is about the protagonist telling her lover to "think twice" before leaving her.

"Think Twice" was released as the fourth single from Dion's third English-language studio album, The Colour of My Love (1993), in July 1994 in North America, in October 1994 in the United Kingdom, Australia and Japan, and in February 1995 in other European countries.

Writer Andy Hill was known for his association with Bucks Fizz and Peter Sinfield was a former member of the rock group King Crimson. Two versions of the music video exist: the first was released in August 1994; later because of the huge success in the UK, Dion made a special music video in December 1994. It aired in the UK Top of the Pops television programme. The UK music video was directed by Randee St. Nicholas. The model of the first version of the Think Twice's video is Steve Santagati.

The B-sides of this single were taken mainly from Dion chante Plamondon album, which was released at that time worldwide. It was also the first time that Dion's English single included French songs as B-sides all over the world. Think Twice was included later on the European and Australian editions of All the Way... A Decade of Song greatest hits (1999) and European edition of My Love: Essential Collection (2008). It remains a staple of Dion's live set in countries where the song was a runaway hit. Dion performed "Think Twice" at the 1995 World Music Awards. "Think Twice" received an Ivor Novello Award for the Best Song Musically and Lyrically in 1995.

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