Lily Allen turned Saturday Night Live into a full-on West End drama when Dakota Johnson crashed the stage as Madeline, delivering a cheeky cameo that had the audience gasping and swooning.
On Dec. 13, the singer-songwriter performed two tracks off her West End Girl album — Madeline and Sleepwalking — on SNL. The album chronicles her high-profile divorce from her husband of four years, David Harbour.
In particular, Lily Allen sings of a husband's illicit affair with the titular character from the point of view of the wife, alongside several monologues from the fictional other woman during Allen's latest SNL performance.

The lyrics go:
"How long has it been going on? Is it just sex or is there emotion? / He told me it would stay in hotel rooms, never be out in the open / Why would I trust anything that comes out of his mouth?"
The song continues:
"We had an arrangement / Be discreet and don't be blatant / There had to be payment / It had to be with strangers / But you're not a stranger, Madeline"
Dakota Johnson takes on role of Madeline in Lily Allen's SNL act
Throughout the performance, Dakota Johnson is hidden behind a sheer curtain, lying idly on a bed, and browsing her phone. She can be heard saying:
"I hate that you're in so much pain right now / I really don't wanna be the cause of any upset / He told me that you were aware this was going on and that he had your full consent / If he's lying about that, then please let me know / Because I have my own feelings about dishonesty / Lies are not something that I wanna get caught up in / You can reach out to me any time, by the way / If you need any more details or you just need to vent or anything / Love and light, Madeline"
As soon as her outro speech concludes, the Fifty Shades of Grey star, clad in a sparkly nightdress, finally steps into the light and puts her head on Lily Allen's shoulder.

Lily Allen's West End Girl was unveiled on Oct. 24. Shortly after its release, theories about her rocky marriage as the inspiration behind the track, Madeline. But for Allen, she is simply "fictional."
According to the Brit awardee, the song tackles how intimacy is defined in modern society and how women view marriage.
"I just feel we are living in really interesting times — in terms of how we define intimacy and monogamy, people being disposable or not. The way we are being intimate with each other is changing as humans … Lots of young women are not finding the idea of marriage or even a long-term relationship that attractive anymore."
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