Billie Eilish covered Julie London’s 1955 version of the jazz classic “I’m In The Mood For Love” during her appearance on BBC Radio 1’s Live Lounge this week.

Eilish was joined by her brother Finneas on acoustic guitar for the stripped back, mellow rendition of the track. You can see their performance below.

“I’m In The Mood For Love” was first published in 1935, and popularized by Frances Langford. It has since been covered by dozens of artists, with London’s version among the most popular.

Finneas also accompanied Eilish on guitar for live versions of “I Didn’t Change My Number,” “NDA” and “Getting Older”, from her recent album Happier Than Ever. You can see “I Didn’t Change My Number” below.

Happier Than Ever arrived last week. Typical of the responses was the NME‘s which said that in “tackling fame and misogyny with old-timey Hollywood glamour, the star has repeated the success of her stellar debut – without repeating any of its tricks.”

It was reported earlier in the week that the album is outselling the rest of the UK’s top-10 albums combined. The Official Charts Company confirmed on Monday that Happier Than Ever is way out in front in terms of the race for this week’s UK number one album, with the record currently the most downloaded album of the week so far.

Dave‘s We’re All Alone In This Together is set to drop to number two after landing the top spot last week, the London artist’s album was still the most-streamed in the UK last weekend.

Earlier today, meanwhile, a new teaser was revealed for Eilish’s upcoming Disney+ concert film Happier Than Ever: A Love Letter to Los Angeles featuring an animated, ‘Disney-fied’ depiction of the singer.

Eilish originally announced the film in July. It will mark Eilish’s second release to streaming services this year, following the February release of her documentary The World’s A Little Blurry to Apple TV+.

Buy or stream Happier Than Ever.