"I strive for originality in my music," Prince declared in a 1985 interview with MTV. "That was, and will always be the case."  

It was this determination to do things his own inimitable way that birthed the decade's most audacious superstar project: Purple Rain 

Prior to the album's June 25, 1984 release, Prince had scored some mainstream hits — including "1999" and "Little Red Corvette" — but hadn't fully blossomed into the prolific, world-conquering musical hero he's now immortalized as. Nor did he have acting experience. Yet, Prince somehow managed to convince his management and label into financing a big-screen hybrid of romance, drama and musical accompanied by an equally ambitious pop soundtrack.   

It was an inherently risky career strategy that could have derailed the Purple One's remarkable rise to greatness in one fell swoop. Instead, Purple Rain enjoyed blockbuster success at both the box office and on the charts, with the film grossing more than $68 million worldwide and the album topping the Billboard 200 for a remarkable 24 weeks.   

Initially conceived as a double album featuring protege girl group Apollonia 6 and funk rock associates the Time, the Purple Rain OST worked as an entirely separate entity, too. In fact, it had already sold 2.5 million copies in the States before the movie hit theaters, largely thanks to the immediacy of lead single "When Doves Cry," Prince's first ever Billboard Hot 100 No. 1.   

And a full 40 years on from its release, Purple Rain's diverse range of power ballads, hard rockers and party anthems still possess the power to stun, whether the phrase "You have to purify yourself in the waters of Lake Minnetonka" is familiar or not. Here's a look at why the GRAMMY-winning record — and 2010 GRAMMY Hall of Fame inductee — is regarded as such a trailblazer.

While the streaming age has encouraged artists and listeners to embrace multiple genres, back in the 1980s, "stay in your lane" was the common mindset. Of course, a musician as versatile and innovative as Prince was never going to adhere to such a restriction.   

The Purple One had already melded pop, soul, R&B, and dance to perfection on predecessor 1999. But on his magnum opus, the star took his sonic adventurism even further, flirting with neo-psychedelia, heavy metal and gospel on nine tracks which completely eschewed any form of predictability. Even its most mainstream number refused to play by the rules: despite its inherent funkiness, "When Doves Cry" is a rare chart-topper without any bass!  

As you'd expect from such a virtuoso, Prince mastered every musical diversion taken. And the album's 25 million sales worldwide proved that audiences were more than happy to go along for the ride. 

Although the likes of Jill Jones, Wendy Melvoin and Lisa Coleman had contributed to previous Prince albums, Purple Rain was the first time the Purple One pushed his female musical proteges to the forefront. On "Take Me With U," he shares lead vocals with one of his most famous, Apollonia. On its accompanying tour, he invited Sheila E. to be his opening act. And in something of a rarity even still today, two of the soundtrack's engineers, Susan Rogers and Peggy McCreary, were women.   

Melvoin and Coleman would go on to become artists in their own right as Wendy and Lisa, of course. And Prince would also help to radically transform Sheena Easton from a demure balladeer into a pop vixen; compose hits by the Bangles ("Manic Monday"), Martika ("Love Thy Will Be Done"), and Sinead O'Connor ("Nothing Compares 2 U"); and provide career launchpads for Bria Valente and 3RDEYEGIRL.

As well as pushing all kinds of boundaries, Purple Rain also broke all kinds of records, including one at the music industry's most prestigious night of the year. At the 1985 GRAMMY Awards, Prince became the first Black artist ever to win Best Rock Performance By A Duo Or Group With Vocal, beating the likes of the Cars, Genesis, Van Halen, and Yes in the process. Purple Rain also picked up Best Score Soundtrack for Visual Media at the same ceremony, and was nominated in the night's most coveted Category, Album Of The Year. 

Another impressive feat was the one that had only previously been achieved by the Beatles and Elvis Presley. With the same-named movie also hitting the top of the box office chart, Prince became only the third artist in history to score a No. 1 album, film and song in the same calendar year.

Although it seems positively chaste compared to the likes of "WAP," "Anaconda," and "My Neck, My Back (Lick It)," Purple Rain's tale of a "sex fiend" who enjoys pleasuring herself in hotel lobbies was deemed so provocative at the time of release that it inadvertently instigated a political taskforce. 

Appalled by the sexual lyrical content of "Darling Nikki," a track she caught her 11-year-old daughter Karenna listening to, future Second Lady Tipper Gore decided to set up the Parents Music Resource Centre with three other "Washington Wives." The organization subsequently persuaded the record industry and retailers to issue any album containing child-unfriendly material with Parental Advisory stickers. (Another Prince-penned hit, Sheena Easton's "Sugar Walls," was also included alongside "Darling Nikki" in the "Filthy 15" list of songs the PMRC deemed to be the most offensive examples.)

Prince was the first pop superstar from the 1980s holy trinity to bridge the gap between Hollywood and MTV, with Purple Rain arriving eight months before Madonna's star turn in Desperately Seeking Susan and four years before Michael Jackson's fantastical anthology Moonwalker. And it spawned a whole host of similar vanity projects, too.   

You can trace the roots of everything from Mariah Carey's Glitter to Eminem's 8 Mile back to the tale of a troubled musical prodigy — nicknamed The Kid — who finds solace from his abusive home life at Minneapolis' hottest night spot. And while the acting and screenplay were never going to trouble the Academy Awards (as lead actress Apollonia predicted, however, it did pick up Best Score), Purple Rain's spellbinding onstage performances captures the euphoria of live music better than any other concert film, fictional or real. 

"I'm not a woman, I'm not a man/ I am something that you'll never understand," Prince sings on Purple Rain's biggest dance floor number "I Would Die 4 U" — one of many occasions in both the album and film that challenged notions of masculinity, gender and sexuality even stronger than the Purple One had before.   

Indeed, although the early '80s was unarguably a boom period for white British pop stars outside the heteronormative norm, it was rarer to find artists of color so willing to embrace such fluidity. Prince, however, had no problem — whether sporting his now-iconic dandy-ish, ruffled white shirt and flamboyant purple jacket combo, or unleashing his impressive array of diva-like shrieks and screams on "Computer Blue" and "The Beautiful Ones." André 3000, Lil Nas X and Frank Ocean are just a few of the contemporary names who have since felt comfortable enough to express themselves in similarly transgressive fashion. 

From the apocalyptic rockabilly of "Let's Go Crazy" ("We're all excited/ But we don't know why/ Maybe it's 'cause/ We're all gonna die") and messianic new wave of "I Would Die 4 U," to the experimental rock of "Computer Blue" and self-fulfilling prophecy of "Baby, I'm A Star," Purple Rain delights at every musical turn. But it's the title track that continues to resonate the most.  

Following Prince's untimely death in 2016, it was "Purple Rain" — not "1999," not "Kiss," not "The Most Beautiful Girl in the World" — that many fans gravitated toward first. Initially conceived as a country duet with Stevie Nicks, the epic power ballad was described by Prince as pertaining "to the end of the world and being with the one you love and letting your faith/ God guide you through the purple rain."  

The superstar acts every inch the preacher on the emotional tour-de-force. And as the final song that Prince ever performed live — on the Atlanta leg of his Piano & A Microphone tour, a week before his untimely passing — closed the curtains on a truly revolutionary career.   

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