Island Def Jam Digital Distribution

Glam metal (often called hair metal) is a flamboyant strain of 1980s hard rock and heavy metal defined by high-energy riffs, anthemic choruses, and glossy, radio-ready production. It pairs the swagger of hard rock with pop hooks, multi-tracked vocal harmonies, and virtuosic guitar solos. Visually, the style is theatrical: teased hair, makeup, spandex, and flashy stagewear echo the glam rock of the 1970s, while the music embraces both party-ready anthems and power ballads. The sound is big, bright, and built for arenas and MTV-era music television.

Hard rock is a loud, riff-driven style of rock music built around heavily amplified electric guitars, a powerful rhythm section, and assertive vocals. Songs typically center on memorable, blues-based guitar riffs, strong backbeats, and energetic, often shouted or belted choruses. The genre emphasizes power, groove, and visceral impact over intricate harmony or extended improvisation. Distortion, power chords, pentatonic melodies, and call‑and‑response between vocals and guitar are core traits, while lyrical themes often explore rebellion, lust, swagger, escape, and cathartic release.

Heavy metal is a loud, guitar-driven style of rock defined by heavily distorted riffs, thunderous drums, and powerful vocals. Its musical language emphasizes minor modes, modal (Aeolian, Phrygian) riffing, and energy over groove, often featuring virtuosic guitar solos and dramatic dynamic contrasts. Emerging from late-1960s blues rock and psychedelic experimentation, heavy metal codified a darker, heavier sound with bands like Black Sabbath, Deep Purple, and Led Zeppelin. The genre values weight, intensity, and grandeur—whether through plodding, doom-laden tempos or galloping, high-energy rhythms—paired with themes that range from personal struggle and social critique to fantasy, mythology, and the occult.

Pop is a broad, hook-driven style of popular music designed for wide appeal. It emphasizes memorable melodies, concise song structures, polished vocals, and production intended for radio, charts, and mass media. While pop continually absorbs elements from other styles, its core remains singable choruses, accessible harmonies, and rhythmic clarity. Typical forms include verse–pre-chorus–chorus, frequent use of bridges and middle-eights, and ear-catching intros and outros. Pop is not defined by a single instrumentation. It flexibly incorporates acoustic and electric instruments, drum machines, synthesizers, and increasingly digital production techniques, always in service of the song and the hook.

R&B (Rhythm and Blues) is a vocal- and groove-centered popular music tradition that blends blues tonality, jazz harmony, and gospel-inflected singing with a steady backbeat. It emphasizes expressive lead vocals, call-and-response, lush harmonies, and danceable rhythms. From its 1940s roots in African American communities to its later evolutions, R&B has continually absorbed and reshaped surrounding sounds—from jump blues and swing in the early days to soul, funk, hip hop, and electronic production in the contemporary era. Today, R&B ranges from intimate, slow-burning ballads to club-ready tracks, all tied together by a focus on feel, melody, and vocal performance.

Rock is a broad family of popular music centered on amplified instruments, a strong backbeat, and song forms that foreground riffs, choruses, and anthemic hooks. Emerging from mid‑20th‑century American styles like rhythm & blues, country, and gospel-inflected rock and roll, rock quickly expanded in scope—absorbing folk, blues, and psychedelic ideas—while shaping global youth culture. Core sonic markers include electric guitar (often overdriven), electric bass, drum kit emphasizing beats 2 and 4, and emotive lead vocals. Rock songs commonly use verse–chorus structures, blues-derived harmony, and memorable melodic motifs, ranging from intimate ballads to high‑energy, stadium‑sized performances.

Adult contemporary (AC) is a radio-driven pop style characterized by smooth vocals, polished production, and lyric themes that speak to adult listeners—love, family, reflection, and everyday life. Musically, it emphasizes mid‑tempo grooves and ballads, clear melodies, and accessible harmonies, often arranged for piano, acoustic or clean electric guitars, light drums, bass, and tasteful string or synth pads. The sound favors warmth and clarity over aggression, with a strong focus on memorable choruses and emotive vocal performances. As a format and a repertoire, adult contemporary bridges soft rock, pop balladry, and easy listening, adapting with each decade while maintaining radio-friendly songwriting and production values.