"Thank God It's Friday" is a 1978 disco song by the studio disco group Love and Kisses, popularized as the theme song of the film by the same name. It peaked at #1 on Billboard's Disco charts, #23 R&B and #22 Pop.

Over the years some radio stations would play the song at 5:00 p.m. on Fridays to mark the end of the work week and get it's audience pumped-up for the weekend. The song's catchphrase tantalized listeners with the prospect of love at the discotheque: "Hey / Put a smile on your face / Things are coming your way / Out there somewhere tonight".

"Thank God It's Friday" is a song written, produced and performed by R&B musician R. Kelly. It entered the UK charts at #23 in 1996.