"
Heaven" was released as the album's
lead single in July 1977. The song was criticised for having "less impact" than her previous singles. It was only a hit in Germany, where it reached number 24. Phil Hendricks of Cherry Red Records suggested that the death of
Elvis Presley on 16 August 1977 may have been a contributing factor to the song's lack of success, due to the diversion of RCA's promotional capabilities. with critics viewing the song as superior to "
Lost in France". "It's a Heartache" was a commercial success, selling over 6 million copies worldwide, establishing itself among of the
best-selling singles of all time. The song became Tyler's first hit in the United States, reaching number three on the
Billboard Hot 100. It also reached number four in the United Kingdom, and number one hit in countries such as Canada, France and Norway. "
Here Am I" was released as the third single from
Natural Force on 7 April 1978. The song was not as commercially successful as "It's a Heartache", only charting in Germany and Norway.
Record Mirror stated that the song lacked the "irresistible hook of "It's a Heartache"." "Hey Love (It's a Feelin')" was released as the fourth single in June 1978, and failed to chart worldwide. "If I Sing You a Love Song" was released as the fifth and final single from
Natural Force in August 1978, and only reached number 103 on the
Billboard Bubbling Under Hot 100. == Track listing ==