The accompanying music video for the single also allowed Perry to debut her alter ego, Kathy Beth Terry.
The singer has revealed that she was inspired to write the track after running naked through a park. According to Music Rooms,she claims that after a wild night of partying and streaking, she wrote the song about her antics the next day. Perry revealed: “There’s nothing better than an impromptu dance party with my friends. My track 'Last Friday Night (T.G.I.F.)' is a song about debauchery because I had one of those nights in Santa Barbara. We went out to this place called Wildcat and got crazy,” Perry admitted: “We had a couple of beers and danced until we died, then brought the party back to the hotel room.” She added: “Most of that song is actual truth, apart from the ménage à trois… unfortunately! But, yes, streaking in the park, that’s what we did, so we had to write a song about it the next day!” Bonnie McKee, the co-writer of the song stated "TGIF is pretty much a word for word description of our trip to Santa Barbara [with Perry], so I love that one. It’s really kitschy and fun and makes me nostalgic."
