Grease is a fictional musical group associated with the 1978 film Grease, which features a blend of rock 'n' roll and pop music from the 1950s and 1960s. The "artist" credit for Grease songs often refers to the film's cast, particularly stars John Travolta and Olivia Newton-John, who performed many of the iconic tracks. The music from Grease became a cultural phenomenon, known for its catchy melodies, nostalgic style, and energetic performances.