"You're the One That I Want" is a song written by John Farrar for the 1978 film version of the musical Grease. It was performed by John Travolta and Olivia Newton-John. It is one of the best-selling singles of all time, having sold over 6 million copies between the United States, the United Kingdom, Germany and France alone.
Upon its release in conjunction with the film (and its status as a potential blockbuster worldwide), the single became a huge international hit, reaching number 1 in several countries. In the U.S. the single reached #1 on the Billboard Hot 100 for one week in June 1978, and was certified Platinum for shipments exceeding 2 million copies. It also topped the UK Singles Chart for nine weeks in the summer of 1978 some months before the film had even been released in that country.
As of 2013, it is still the fifth best-selling single of all time in the U.K., where it has sold 2 million copies.