Question: Celebration – The Anniversary Album is a compilation album by American pop singer Johnny Mathis that was released in the UK in 1981, which popular 1976 Christmas song?

Context paragraphs:
The Hits of Johnny Mathis: The Hits of Johnny Mathis is a compilation album by American pop singer Johnny Mathis that was released in the UK in 1995 by Columbia Records and has three of his UK singles chart entries ("Misty", "I'm Stone in Love with You", and his 1981 duet remake of "When a Child Is Born" with Gladys Knight).  This collection, however, focuses primarily on his covers of hits from the late 1960s through the 1970s.

The Johnny Mathis Collection: The Johnny Mathis Collection is a compilation album by American pop singer Johnny Mathis that was released in the UK in 1976 by Hallmark and Pickwick Records in arrangement with the CBS Records division of Columbia.  This is a two-LP set, with the first two sides being what is actually a reissue of the singer's 1961 compilation "Portrait of Johnny" and the second two being 10 tracks from three other albums: 1959's "Faithfully", 1967's "Up, Up and Away" and 1968's "Those Were the Days".

The Complete Christmas Collection 1958–2010: The Complete Christmas Collection 1958–2010 is a three-disc box set by American pop singer Johnny Mathis that was released in 2015 by Real Gone Music under license from Columbia Records.  The set includes Mathis's five holiday albums from the period in their entirety: "Merry Christmas", "Sounds of Christmas", "Give Me Your Love for Christmas", "Christmas Eve with Johnny Mathis", and "The Christmas Album".  It also compiles all of Mathis's holiday songs that were only released as singles, as well as thematically-appropriate tracks from his non-holiday albums: "When a Child Is Born" from "I Only Have Eyes for You", the holiday version of "What a Wonderful World" from "Let It Be Me", and his two recordings of "Ave Maria" from "Good Night, Dear Lord", which bookend the set.

The Best of Johnny Mathis 1975–1980: The Best of Johnny Mathis 1975–1980 is a compilation album by American pop singer Johnny Mathis that was released in the fall of 1980 by Columbia Records.  This collection is similar to his last major compilation, 1972's "Johnny Mathis' All-Time Greatest Hits", in that it excludes many of his American radio hits of this period ("Arianne", "Begin the Beguine", "Do Me Wrong, but Do Me", "Loving You-Losing You", "One Day in Your Life", "Stardust", "Yellow Roses on Her Gown", and "You're All I Need to Get By", all of which made the Adult Contemporary chart in "Billboard"

The First 25 Years – The Silver Anniversary Album: The First 25 Years – The Silver Anniversary Album is a compilation album by American pop singer Johnny Mathis that was released in 1981 by Columbia Records.  The back cover of the album notes that there are four new tracks ("It Doesn't Have to Hurt Every Time", "Nothing Between Us but Love", "There!  I've Said It Again", and "The Way You Look Tonight").  A cover of the Commodores hit "Three Times a Lady" had been released on the UK version of his 1980 album "Different Kinda Different", which was retitled "All for You", but the Mathis rendition of the song makes its US debut here.

Gold: A 50th Anniversary Christmas Celebration: Gold: A 50th Anniversary Christmas Celebration is a compilation album by American pop singer Johnny Mathis that was released on September 19, 2006, by Columbia Records and Legacy Recordings.  It includes selections from four of the first five Christmas albums that he had recorded: "Merry Christmas", "Sounds of Christmas", "Christmas Eve with Johnny Mathis", and "The Christmas Album".  Two tracks that were recorded with other artists are also included: "O Tannenbaum", which comes from Mannheim Steamroller's 2001 album "Christmas Extraordinaire", and a medley duet of "Winter Wonderland" and "Let It Snow!  Let It Snow!  Let It Snow! " with Bette Midler from her 2006 holiday album "Cool Yule".

Celebration – The Anniversary Album: Celebration – The Anniversary Album is a compilation album by American pop singer Johnny Mathis that was released in the UK in 1981 (upon the 25th anniversary of his first recording) by the CBS Records division of Columbia.  Two of the covers on this release had not previously been included on any Mathis album: Stevie Wonder's "If It's Magic" and a new version of Mathis's 1976 song "When a Child Is Born" that was recorded with Gladys Knight & the Pips and reached number 74 on the UK singles chart during a two-week run that began on December 26, 1981.

The Classic Christmas Album (Johnny Mathis album): The Classic Christmas Album is a Christmas compilation album by American pop singer Johnny Mathis that was released on October 7, 2014, by Columbia Records and includes two 1961 recordings that were previously unavailable: "Ol' Kris Kringle" and the original version of the title track from his 1969 Christmas album "Give Me Your Love for Christmas".  Three other songs ("Christmas in the City of the Angels", "Sign of the Dove" and "The Very First Christmas Day") make their debut on compact disc as of this release, and two other non-album singles ("Christmas Is..." and "My Kind of Christmas") can be counted among the rarities here.  The collection also includes a selection or two from several of Mathis's Christmas studio albums—"Sleigh Ride" from "Merry Christmas", "Have Yourself a Merry Little Christmas" from "Sounds of Christmas", "Calypso Noel" from "Give Me Your Love for Christmas", "The Christmas Waltz" and "It's Beginning to Look a Lot Like Christmas" from "Christmas Eve with Johnny Mathis", and "Home for the Holidays" from "Sending You a Little Christmas"—as well as his duet with Bette Midler from her 2006 holiday album "Cool Yule", which was a medley of "Winter Wonderland" and "Let It Snow!  Let It Snow!  Let It Snow! ".

The Mathis Collection: The Mathis Collection is a compilation album by American pop singer Johnny Mathis that was released in the UK in 1977 by the CBS Records division of Columbia.  The subtitle on the cover reads, "40 of my favorite songs", and a statement from Mathis in the liner notes says, "Songs are very personal things.  On this double album I have attempted to put together a collection of those which are most meaningful for me.  I hope they mean as much to you."  The compilation includes six of the 12 songs that had reached the UK singles chart by the time of its release ("A Certain Smile", "Winter Wonderland", "Someone", "Misty", "I'm Stone in Love with You", and his UK number one from 1976, "When a Child Is Born") but focuses mainly on album tracks.

When a Child Is Born: "When A Child Is Born" is a popular Christmas song.  The original melody was "Soleado", a tune from 1974 by (alias Zacar), composer for Italy's Daniel Sentacruz Ensemble, and Dario Baldan Bembo.  The tune was based on Damicco's earlier tune "Le rose blu" published in 1972.  The English language lyrics were written a few years later by Fred Jay (Friedrich Alex Jacobson IPI number 00015195204, who wrote many hits for Boney M such as Rasputin and Ma Baker).  They do not make specific mention of Christmas but the importance they attach to looking forward to the birth of one particular child somewhere, anywhere, suggests a reference to the birth of Jesus Christ, and the citing of "a tiny star" that "lights up way up high" may allude to the Star of Bethlehem.  Fred Jay's lyrics have been sung by many artists, most successfully by Johnny Mathis in 1976.

Supporting paragraphs: Celebration – The Anniversary Album When a Child Is Born
Answer: When A Child Is Born