Prior to its release, the 1975 performed "Somebody Else" at a December 2015 show in
Philadelphia and incorporated pink lighting. In September 2016, they performed the song at the
Leeds Festival, with
Gigwise deeming it the highlight of their set. The 1975 performed the track on the 8 November 2016 episode of
Late Night with Seth Meyers alongside "A Change of Heart". The following year, "Somebody Else" was included as part of the band's headlining setlist for the
Reading Festival. "Somebody Else" was used in
13 Reasons Why,
The Edge of Seventeen and
Love Island.
Cover versions released a cover version of "Somebody Else" to
SoundCloud in September 2016. American singer
Charlie Puth performed a cover of "Somebody Else" for his
BBC Radio 1 Live Lounge set in September 2016. American musician
Vérité released a cover of the song on 9 September 2016 to her
SoundCloud. While praising the track's simplicity, relatability and songwriting, the musician asserted she "really wanted to take it into [her] world and reinterpret it a bit". Vérité's rendition features a faster
rhythm and incorporates a "club-ready" beat, deep, oscillating bass and propulsive synths. The musician uses subdued,
minimalist instrumentation in the verses, while the chorus is rooted in pop music and features an
EDM-like
drop. In February 2017, English
indie rock group
Circa Waves performed a
rock and roll rendition of "Somebody Else" for
MistaJam on BBC Radio 1. In June 2017, Holden accidentally played his vinyl copy of
I Like It When You Sleep, for You Are So Beautiful yet So Unaware of It at double speed, discovering the song sounds similar to the work of Scottish synth-pop group
Chvrches. After tweeting about the discovery, Chvrches member
Martin Doherty humorously replied, asking if the opposite was also true. The group later performed their own rendition of the track in BBC Radio 1's Live Lounge on 15 March 2018. At the
le Zénith show in Paris on 5 October 2017, New Zealand musician
Lorde performed "Somebody Else" as part of the setlist for her
Melodrama World Tour. For her rendition, the musician used a near-identical arrangement rather than paring the song down. Roth praised Lorde's "fittingly dreamy" cover and complimented the track's sonic connection to Lorde's
Melodrama (2017).
Junkee declared it the musician's fifth-best cover; Jules Lefevre echoed Roth's comments regarding the similarities between "Somebody Else" and the music on
Melodrama. Gray's performance featured oversaturated pink and purple lights reminiscent of the artwork for
I Like It When You Sleep, for You Are So Beautiful yet So Unaware of It, and he incorporated layered vocals in the chorus. The singer-songwriter called the song a personal favourite from the band and described his version as "a little more sombre and not as well played on guitar", saying it "is one of those songs that no matter who you are and where you are in life, you can’t help but think of someone in your past when it plays". In the publication's list of Gray's Top Five Favourite Covers,
Soundigest ranked his performance of the track at number one; Courtney Gould commended the video's lighting and his vocals for "highlight[ing] the dynamic details that make this song so special". In March 2020,
American Idol season 18 contestant Adam Curry performed "Somebody Else" for Hollywood Week. Curry's rendition of the song received praise for its "artistry" and "legitimacy", with Robbie Daw of
Billboard writing the singer "knock[ed] everyone out with a solid rendition" of the track. On 7 May 2020,
The Face hosted a tribute concert via Instagram for the 1975 to recognise their influence on contemporary artists. Several artists performed covers of the band's songs;
Gracie Abrams was chosen to perform "Somebody Else". Korean-New Zealand singer
Rosé, a member of
K-pop girl group
Blackpink, performed the track as part of an
Instagram Live mini-concert on 17 May 2020, closing out the show. == Legacy ==