Here's some trivia from the Congratulations Songfacts.
"Congratulations" is the longest single-word title and is also the longest (legitimate) word to appear in the title of an UK chart-topper.
John Paul Jones, later of Led Zeppelin, played bass guitar on this.
This came in #2 in the 1968 Eurovision Song Contest.
For more trivia and info on Congratulations check out http://www.songfacts.com/detail.php?id=11414
Congratulations and celebrations
When I tell everyone that you're in love with me
Congratulations and jubilations
I want the world to know I'm happy as can be