Katy Perry: Last Friday Night (TGIF) Video. Getting into character as her nerdy alter ego, Katy Perry transformed herself into Kathy Beth Terry for the brand new music video accompanying her latest single, "Last Friday Night (TGIF)".
The 26-year-old singer enlisted the help of YouTube sensation Rebecca Black for the just-released effort - with the two ladies shown attending a party packed with fellow teens.
During the course of the video, Perry's character winds up waking up alongside an attractive fella, proceeding to try and remember what happened during the wild night.
Katy's latest creation also includes appearances by "Glee" actor Kevin McHale and musician Kenny G.
