"Isn't It Midnight" is a song by the British-American rock band Fleetwood Mac, from their 1987 studio album Tango in the Night. The song was co-written and sung by Christine McVie, with contributions from Lindsey Buckingham and McVie's then-husband Eddie Quintela. "Isn't It Midnight" was the sixth and final single to be released from Tango in the Night in 1988. The cover art for the single features the portrait of Mademoiselle Caroline Rivière. The verse is in E Aeolian with a i-bVII-i-i progression, while the bridge and chorus are in B Aeolian, with a i-bVI-bVII-i progression. Release In the United Kingdom, "Isn't It Midnight" was released as the follow-up to "Everywhere"; it charted at a peak position of No. 60 on 18 June 1988. The song performed better in Ireland, where it reached the top 30, peaking at No. 23. The song was also released as a single in the United States as an original album cut and as a live performance taken from the Tango in the Night concert filmed at Cow Palace. The former version reached No. 14 on the Billboard Mainstream Rock chart. "Isn't It Midnight" was the second official Fleetwood Mac song to be released on the 3-inch CD single format as well being issued on 7" and 12" vinyl. All of the formats included the Tango in the Night track "Mystified", and the CD and 12-inch included the bonus tracks "Say You Love Me" (from 1975; it had previously been included as a bonus track on the "Everywhere" CD single) and "Gypsy" (from the 1982 album Mirage). The song was featured consistently throughout Fleetwood Mac's Tango in the Night and Behind the Mask concert tours, though it was not played after 1990 until 2015 when it was played at selected Fleetwood Mac concerts. Alternate versions There are two alternate mixes of the song, one featured on the 1992 four-disc retrospective 25 Years – The Chain, and one on the Tango in the Night deluxe set released in 2017. Both versions of the song have a sparser synth-driven arrangement with a lack of select electric guitar and backing vocal passages from Lindsey Buckingham. The mix featured on 25 Years – The Chain is also included on the 1992 CD single "Love Shines". Reception In a retrospective review, Alexis Petridis of The Guardian described "Isn't It Midnight" as an example of McVie's "bullet-proof" songwriting, a "confection of