Next in our series of looking back at songs from 10, 15, 20 years ago is Best Song of 2006, a great year for breakthrough acts in a wide variety of genres — some of whom have become giants in the music industry.

Dolly Parton is a singer, songwriter, musician, actor, producer, philanthropist, entrepreneur — and an American icon. We look back at her storied seven-decade career as we attempt to name her very best song.

Mariah Carey took the music world by storm when she burst onto the scene in 1990, and has reinvented the game — and herself — multiple time since. With the imminent arrival of her newest album, we look back at 16 of her most iconic songs.

It’s already been 10 years since the songs of 2015 ruled the airwaves and music-streaming apps. We look back at 16 of the most-popular, and most critically acclaimed, songs from the midpoint of the 2010s.