"Can't Smile Without You" is a song written by Christian Arnold, David Martin, and Geoff Morrow, and recorded by various artists including Barry Manilow and The Carpenters. The version recorded by Manilow in 1977 and released in 1978 is the most well-known version, though it was not the first to be recorded or released.
Manilow's version has slightly different lyrics from the Carpenters' version such as the Carpenters's line "I can't laugh and I can't walk/I'm finding it hard even to talk" which was changed in Manilow's version to "I can't laugh and I can't sing/I'm finding it hard to do anything". The Carpenters remixed the song with additional orchestration for the B-side of the 1977 "Calling Occupants of Interplanetary Craft" single, revising the lyrics to read "I can't laugh and I can't sleep/I don't even talk to people I meet".
On behalf of the songwriters, publishing company Dick James Music sued George Michael for plagiarism in the mid 1980s claiming that the 1984 Wham! single, "Last Christmas", lifted its melody from "Can't Smile Without You". The case was settled out of court.
In 1997, Japanese carmarker Infiniti used Barry Manilow's version as background music in a commercial for its Q45 model. In the commercial, actor Ernie Sabella is served with divorce papers goes and on a rampage through his home, cutting things in half with a chainsaw. He stops upon reaching the car and - as the music plays - has a change of heart, declaring that they could work it out. 
In 2008, an attempt was made by Tottenham Hotspur F.C. supporters following their League Cup win to get the song to No. 1 as they see this song as being a part of the club with the words "Can't Smile Without You" being seen on many of its flags, banners, and websites.