Despite all its thrills and stunning visuals, Zack Snyder's Justice League aka The Snyder Cut had its fair share of emotional moments. Allison Crowe's emotional rendition of Leonard Cohen's Hallelujah during the end credits similarly made for a tearjerking sequence. The song has been covered time and again in various films and yet it doesn't seem to have gotten oversaturated.

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Even though the film didn't feature any other song in particular and mostly relied on Junkie XL's score, the DC Extended Universe has relied on a few original singles along with reused tracks that have become synonymous with the franchise's films.

Come Together by Gary Clark Jr: Justice League

Gary Clark Jr. playing the guitar and performing Come Together in a Justice League promo

The 2017 Justice League was heavily panned and is now easily forgotten in the popular imagination, thanks to the aforementioned Snyder Cut. However, if the film did have a few redeeming elements, it would the official single Come Together that was performed by blues-rocker Gary Clark Jr while Junkie XL handled the production.

The song is an adrenaline-fueled take on the original Beatles classic of the same name. While the true meaning of the lyrics has always been ominous, Gary Clark's power-packed vocals on the chorus serve well for a call to unite the film's heroes. Add in a few guitar solos and one gets probably the best rendition of the song.

Gangsta By Kehlani: Suicide Squad

Joker and Harley Chemical Wedding in Suicide Squad

While the Suicide Squad soundtrack has no dearth of foot-thumping numbers, Gangsta is a slightly slow-paced emotional track delving into the intricacies of the toxic relationship shared between Joker and his therapist-turned-accomplice Harleen Quinzel (Harley Quinn).

Unfortunately, some fans might have romanticized their bond but a song like Gangster offers a darker look. Even though it sounds hauntingly beautiful, Skylar Grey's lyrics expose Harley Quinn's insecurities that the Joker preys on.

Joke's On You By Charlotte Lawrence: Birds Of Prey

Harley Quinn destroys Ace Chemicals in Birds of Prey

Joke's On You can be seen as a more optimistic sequel to Gangsta as it marks Harley's emancipation from the aforementioned toxic romance. Charlotte Lawrence's jarring voice along with a lively instrumental arrangement plays at a crucial point in Birds of Prey. The film introduces a single and revamped Harley Quinn as she wreaks havoc around the ACME chemical plant where she had taken a leap of faith into a vat of chemicals, confessing her love for the 'clown prince of crime'.

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However, Joke's On You makes it evident that she's over this phase as she drives a truck into the plant triggering an explosion in the entire complex.

Heathens By Twenty One Pilots: Suicide Squad

Tyler Joseph behind bars in a still from the Heathens music video

The Grammy-winning single Heathens by rap-rock duo Twenty One Pilots is a perfect song in terms of encapsulating the Suicide Squad as a whole. While the team's film often featured tracks focusing on Harley Quinn or the Joker, Heathens finds lead singer Tyler Joseph crooning from the perspective of an outcast, a so-called "heathen" who has rejected all morals of society and finds solace amongst fellow heathens.

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This cynical sense of acceptance suits characters like Deadshot and El Diablo who don't wish to turn into antagonists but their circumstances force them to.

Everybody Knows By Sigrid: Justice League

Justice League 2017 banner featuring Flash, Batman, Aquaman, Cyborg, and Wonder Woman

Joss Whedon's Justice League's opening credits are notorious for featuring a CGI-enhanced Superman. However, the song that plays over the credits eventually adds some grit and soul to the air of uncertainty that the film intended to set. Originally written and performed by the late Leonard Cohen, the song is a cynical depiction of impending doom. The lyrics touch upon modern-day vices and causes of human destruction in a bittersweet manner.

Sigrid's version sounds even more tragic as she follows an intentionally monotonous and hushed-down approach to the song, bolstered by prophetic words like 'everybody knows that the Plague is coming'.

Sucker For Pain By Imagine Dragons, Lil Wayne, Wiz Khalifa, Logic, Ty Dolla $ign & X Ambassadors: Suicide Squad

This all-star collaboration from Suicide Squad tends to go down a sadistic path especially in Imagine Dragons frontman Dan Reynolds' chilling chorus that seems like it's from the Joker's fascination with torture.

Rappers Wiz Khalifa, Lil Wayne, Logic, and Ty Dolla $ign cover themes of loyalty and trust, essential tenets of a "squad". Towards the final act, Reynolds passes the baton to X Ambassadors' lead singer Sam Harris as he hums an equally haunting intro on how all this pain has him begging for more.

To Be Human By Labrinth & Sia: Wonder Woman

Wonder Woman movie poster courage theme

To Be Human plays towards the end credits of Wonder Woman and was released as an official single for the film, featuring vocals from Labrinth and Sia. Both singers would later end up joining forces with Diplo forming the supergroup LSD.

The uplifting duet captures the film's titular heroine's journey from an Amazonian princess to a savior of humanity who eventually must become one of the humans themselves. A love for Steve Trevor further makes her feel emotions that she hadn't et felt in her native island of Themyscria.

Everything I Need By Skylar Grey: Aquaman

Skylar Grey talking about her Aquaman track Everything I Need

Written by Skylar Grey, Everything I Need is a deeply romantic track expressing the songstress's admiration for her beloved. True to Aquaman's marine environment, several metaphors around the ocean make way into the lyrics. Two versions were released for the film's end credits as well as an album version, both of which differ in terms of the instrumentals.

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It was clearly a more well-received track than Ocean to Ocean, Pitbull's remixed take on Toto's Africa. Everything I Need is Skylar Grey's third DC project, having written Gangsta and performed Wreak Havoc for Suicide Squad.

Diamonds By Normani & Megan Thee Stallio: Birds Of Prey

Megan Thee Stallion and Normani holding baseball bats in the video for Diamonds (Birds of Prey)

Sampling Marilyn Monroe's rendition of Diamonds Are A Girl's Best Friend (from the film Gentlemen Prefer Blondes), Normani croons the original lines while Megan Thee Stallion raps about her relationships and villainous tendencies if incited.

The track was the lead single from the Birds of Prey soundtrack and a snippet of the video featured Margot Robbie's Harley Quinn decked up in a red with a Marilyn Monroe wig, referencing an iconic scene from Monroe's 1953 musical comedy.

Hallelujah By Allison Crowe: Zack Snyder's Justice League

Allison Crowe with Zack Snyder, both smiling at the camera

Dedicated to director Zack Snyder's daughter Autumn, every second of Allison Crowe's Hallelujah cover is emotional. Crowe had initially covered the classic in 2005. When Deborah and Zack Snyder initially discovered Crowe's YouTube video of the same, they wished to feature the song for Watchmen, only to use Leonard Cohen's original. Fans did hear Cohen's bass-heavy voice for the first sneak peek of the 'Snyder Cut'.

'He let me know that it was Autumn's favorite song. We wanted to do this in tribute to Autumn. This whole project really is a tribute to Autumn, and to the family.' Crowe adds, explaining the significance of her cover.

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