The music video for Katy Perry's next single, 'Last Friday Night (T.G.I.F)', has leaked online ahead of its official June 14 release date. 

The highly anticipated visuals don't disappoint as they feature a cameo from 'Friday' singer and viral sensation Rebecca Black, and Glee's Kevin McHale, who plays the role of Artie, can also be seen making an appearance. 

There is also a segment of distinct product placement as Perry and Black are shown playing the interactive Wii video game, 'Just Dance'. Her fans' response has been great so far as the video has made the worldwide top ten trending list on Twitter. 

Watch the video in full, with obviously altered vocals due to its leak, here: