"Lost in the Fifties Tonight (In The Still of the Night)", a single released by country music singer Ronnie Milsap. It is a medley of "Lost in the Fifties Tonight" written by Mike Reid and Troy Seals and a cover of The Five Satins' 1956 hit "In the Still of the Night".

Released in July 1985, the song was Milsap's 42nd single to be released. At the same time, it was also his 27th No. 1 hit on the Billboard Hot Country Singles & Tracks chart.

Like many of his other singles, the song also fared well as a crossover hit on the Billboard Adult Contemporary charts as it entered the Top 10, peaking at No. 8. This is his last Top 10 single to appear on this chart.

The song was praised by critics, and fans alike, and remains as one Milsap's most popular recordings. In a year when 51 songs rotated out of the Hot Country Singles' No. 1 position, "Lost in the Fifties Tonight" was one of just two songs of the group to spend more than one week at No. 1 (it spent two, as did The Judds' "Have Mercy"), and Milsap's song was the No. 1 country song of 1985.

That same year, it won Milsap his fourth Grammy Award for "Best Country Vocal Performance" for a male artist.

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