Buy "Last Friday Night (T.G.I.F.) [feat. Missy Elliott]" on iTunes here: http://goo.gl/kBG7G
Official lyric video for Katy Perry's "Last Friday Night (T.G.I.F.) [feat. Missy Elliott]", the fifth single off Katy's latest album 'Teenage Dream'. http://goo.gl/cy9gz
