"Say It Ain't So" is a song by the American rock band Weezer, featured on their self-titled debut album, often referred to as the "Blue Album." Released in 1994, the song combines elements of alternative rock and power pop, showcasing the band's signature sound. The lyrics reflect themes of personal struggle and emotional turmoil, drawing from lead vocalist Rivers Cuomo's experiences. The song is notable for its catchy melody and dynamic shifts between soft verses and powerful choruses. It has received critical acclaim and remains one of Weezer's most popular tracks, often performed at concerts and included in various music compilations.