“Last Friday Night (T.G.I.F.)” is a song by American singer Katy Perry from her third studio album, “Teenage Dream”.
It is a dance-pop song with lyrics about drunken fun and debauchery. The “T.G.I.F.” in the title is an acronym for “Thank God It’s Friday”.
The song had chart success worldwide. By topping the US Billboard Hot 100, Perry became the first female solo artist to have five number-one singles on the Hot 100 from a single album.