Katy Perry releases 'Last Friday Night' video extras

Katy Perry has released a collection of video clips featuring characters from her recent music video for 'Last Friday Night (T.G.I.F.)'.

The 26-year-old performer plays a nerdy 13-year-old high school student called Kathy Beth Terry in her latest promo.

The 'Last Friday Night (T.G.I.F.)' video also features cameos from Rebecca Black, Hanson and Glee stars Darren Criss and Kevin McHale.

Perry has now unveiled a series of clips featuring some of the promo's characters, including Kathy Beth Terry speaking about her crush Steve Johnson and admirer Everett McDonald.

The singer recently set up Twitter and Facebook accounts for her alter ego Kathy Beth Terry, with the character's Twitter page having gained over 69,000 followers already.

Watch a selection of the 'Last Friday Night (T.G.I.F.)' extra videos below: