Amber Mark dives headfirst into pleasure on her new single. “Sweet Serotonin,” the lead track from her forthcoming sophomore album, is a lush, groove-heavy invitation into Mark’s most playful and emotionally electric era yet.

Backed by a slinky bassline and percussion that hums like a heartbeat, the song captures the jittery thrill of falling into someone’s orbit. “You talking sweet, you talking sly now / You giving me that sugar high now,” she sings with breathy confidence, delivering each line like it’s dipped in honey. It’s seductive without being showy, confident without losing its softness. The instrumentation feels both intimate and expansive — warm synth layers, little rhythmic flutters, and Amber Mark’s voice, which glides across the beat like she’s chasing her own high.

This single is the first glimpse into her next chapter following 2022’s Three Dimensions Deep, a critically embraced project that blended existential themes with soulful precision. While Three Dimensions Deep asked cosmic questions, “Sweet Serotonin” feels grounded in the now — in chemistry, craving, and late-night vulnerability. It’s the sound of Amber Mark loosening the grip a little, and it suits her.

Last year’s Loosies EP hinted at her growing versatility — dabbling in disco, R&B, and neo-soul — but this new track sharpens that energy into something tighter, brighter, and more addictive. “Sweet Serotonin” doesn’t aim for the stars; it turns inward and pulses like a heartbeat.

And she’s bringing that energy to arenas. This fall, Amber joins Sabrina Carpenter’s Short n’ Sweet Tour, lighting up stages in major cities like New York, L.A., Toronto, and Nashville. For fans, it’s the perfect setup: a serotonin-boosting single, a massive tour, and a long-anticipated sophomore album on the horizon.