2009: #1 - "Poker Face"

P-p-p-poker face

P-p-poker face

P-p-p-poker face

P-p-poker face

Though it strangely nicks an old throwaway hit by an Eagle flying solo, the chorus to Lady Gaga's "Poker Face" helped it both define and transcend late-00's "electro-pop". Right up there in stature with "Single Ladies", "Womanizer" and "Umbrella" - but better than all three combined because of its stunning chorus, cheeky double entendres and the unforgettable titular robo-hook - "Poker Face" was infectious and bombastic with a sly, modern sheen, both a throwback to the fearless melodies of 80's dance anthems and a look forward to the future of radio pop.

With "Poker Face", Lady Gaga took her place among the decade's pop greats, equaling and maybe surpassing any single by Beyonce, Missy Elliott, Nelly Furtado, Ciara or Gwen Stefani. It even single-handedly made her more important than ex- and current "It Girls" Britney Spears and Rihanna, at least in our book. I don't know if she (or anyone) will ever recreate this kind of magic again, but it was trashy fun while it lasted.