In the midst of her California Dreams tour, pop star Katy Perry has released a teaser for "Last Friday Night (TGIF)," the fifth single to be released from her Teenage Dreams album. And she's invited YouTube sensation Rebecca Black, who also famously crooned about Friday nights, to have a cameo in the music video.

The video follows the fictional account of Perry's alter-ego, Kathy Beth Terry, who recalls the excruciating details of her debauched escapades on a previous Friday night. While many might argue that the video's content is a little inappropriate for the 13-year-old Black, you can catch her sitting on a couch in the background of one party scene, if you're careful not to blink.

Perry has also recently been playing clips of Black's YouTube song, "Friday," on her tour. The full video for "Last Friday Night (TGIF)" will premiere on June 14.

Watch the teaser here:

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