Katy Perry - Last Friday Night (T.G.I.F.) on Flickr.
This history-making 5th #1 single from Katy’s “Teenage Dream” was the second track on the album, following the title track, for a reason; it epitomizes the rowdy, teenage-party-fun vibe of the record. With a classic Dr. Luke guitar intro, bold, powerful Max Martin melodies and flirty-fun McKee lyrics, It has the trifecta of amazing pop-music. Definitely her best offering this year.