The UK Singles Chart is one of many music charts compiled by the Official Charts Company that calculates the best-selling singles of the week in the United Kingdom. Before 2004, the chart was only based on the sales of physical singles. This list shows singles that peaked in the Top 10 of the UK Singles Chart during 1978, as well as singles which peaked in 1977 and 1979 but were in the top 10 in 1978. The entry date is when the single appeared in the top 10 for the first time (week ending, as published by the Official Charts Company, which is six days after the chart is announced). One-hundred and twenty-one singles were in the top ten in 1978. Seven singles from 1977 remained in the top 10 for several weeks at the beginning of the year, while "Song for Guy" by Elton John, "Lay Your Love on Me" by Racey and "Y.M.C.A." by The Village People were all released in 1978 but did not reach their peak until 1979. "It's a Heartache by Bonnie Tyler and "Love's Unkind" by Donna Summer were the singles from 1977 to reach their peak in 1978. Eighteen artists scored multiple entries in the top 10 in 1978. Blondie, Commodores, Kate Bush, Sarah Brightman and The Village People were among the many artists who achieved their first UK charting top 10 single in 1978. The 1977 Christmas number-one, "Mull of Kintyre" by Wings, remained at number-one for the first four weeks of 1978. The first new number-one single of the year was "Uptown Top Ranking" by Althea & Donna. Overall, fourteen different singles peaked at number-one in 1978, with Boney M., John Travolta and Olivia Newton-John (2) having the joint most singles hit that position. Background Multiple entries One-hundred and twenty-one singles charted in the top 10 in 1978, with one-hundred and thirteen singles reaching their peak this year. Eighteen artists scored multiple entries in the top 10 in 1978. Bee Gees and Darts shared the record for most top 10 hits in 1978 with four hit singles each. Kate Bush was one of a number of artists with two top-ten entries, including the number-one single "Wuthering Heights". ABBA, Bob Marley and the Wailers, The Boomtown Rats, Rose Royce, Sham 69 and Wings were the other artists who had multiple top 10 entries in 1978. Chart debuts Fifty-eight artists achieved their first