Sing along refers to the activity of singing a song with someone or a group in an interactive way. There are various synonyms for sing along, including karaoke, croon, warble, hum, chorus, chant, serenade, vocalize, and musically accompany. Karaoke is a popular way to indulge in sing-along fun where one can sing with a pre-recorded instrumental accompaniment. Crooning and warbling are styles of singing where the voice is low, smooth and sustained. Humming and chanting are simpler forms of singing where one sings in a monotone manner. Serenading and vocalizing have more romantic connotations and refer to singing for someone. Whatever the style, singing along is a great way to connect with people and spread joy.