Known for her lilting melodies, moody retro-inspired production and wistful vocals, Lana Del Rey's music is instantly recognizable.

But aside from her signature sound, the Old Hollywood-style pop star also constantly delivers on the aesthetic front, churning out visuals heavily influenced by the pop culture of yesteryear, from the chic Twiggy-esque mod glamour of the '60s to the whimsical bohemian flair of the '70s—all with her own contemporary Los Angeles ride or die chick twist.

Over the years, Del Rey's vintage-hued album covers have followed somewhat of a thematic pattern: smoldering gaze coupled with a brooding, pouty frown. From Born to Die to Honeymoon, the "Love" singer has seemingly avoided smiling like the plague (aside from a handful of grin-baring compilation CDs and EPs, which have become the exception, not the rule).

On April 11, however, the artist revealed the romantic '70s rock-inspired cover for her fifth studio album, the forthcoming hopeful, more "socially aware" Lust For Life, which features a flower child-esque Del Rey not only smiling, but beaming ear to ear—marking a tonal shift in both Del Rey's (somewhat) more upbeat music and attitude.

And while we likely haven't seen the last of Del Rey's somber pout, we can't help but hope the singer has finally shaken off her eternal "Summertime Sadness."

Above, journey through the evolution of Lana Del Rey's album art.