“Though Bruno Mars' last album (24K Magic) was released in 2016, it felt like a Disneyland recreation of 1986... "Leave the Door Open" turns '70s soul into a costume drama, without the drama.” Pitchfork · 5 years ago
"Leave the Door Open" is a masterfully crafted tribute to 1970s Philadelphia soul that manages to feel both fresh and deeply nostalgic. As the debut single from —the super-duo of Bruno Mars and Anderson .Paak —the track eschews modern pop trends in favor of lush instrumentation, complex harmonies, and a "grown and sexy" vibe. Musical Composition and Performance
: The "no-frills" approach captures the band’s unbridled happiness and infectious energy, making the viewer feel as if they are being personally serenaded. Critical Perspectives
The song is a "masterclass in classic R&B," characterized by its seamless vocal interplay and sophisticated production.
: The arrangement is dense and rich, featuring swooning strings, a smooth bass line, and even a glockenspiel—elements reminiscent of legendary groups like The Delfonics and The Chi-Lites .
: The duo exhibits an effortless chemistry; .Paak provides a raspy, soulful flow in the verses, while Mars delivers a "liquid gold" performance on the soaring chorus. Reviewers often note that .Paak's genuine enjoyment and unique style prevent the track from feeling like a mere "costume drama".