Oops I Did It Again
Poker Face/Paparazzi/Alejandro
Macarena
Ai Se Eu Te Pego+Tschê Tschê
Thriller, Bad
I Will Always Love You
Who Let The Dogs Out (or something like that)
I Will Survive
Bloed, Zweet en Tranen
Don't ask me why, but back in '09 P!nk's "Mean" from Funhouse got TONS AND TONS of airplay and it wasn't even a single!!! They just decided to play it and they did, and I can tell, at least in Montevideo (Uruguay's capital city, where I live) everyone knows the lyrics to this song (or most of them)
Damn @people just breezing past the "NO recent pop songs" bit.
USA:
Vogue - Madonna
Thriller/Beat It/Billie Jean - Michael Jackson
I Will Always Love You - Whitney Houston
Can't Touch This - MC Hammer
Hound Dog - Big Mama Thornton (best known recording by Elvis)
I Feel Good - James Brown
At Last - Etta James
Respect - Aretha Franklin
Purple Rain - Prince
Man I Feel Like a Woman - Shania Twain
Ice Ice Baby - Vanilla Ice
Waterfalls - TLC
Hero - Mariah Carey
Let's Get It On - Marvin Gaye
The old American songbook standards - Over the Rainbow, Stormy Weather, Just The Way You Look Tonight, Fly Me To The Moon etc.
All the Christmas standards - Jingle Bells, The Christmas Song, Oh Come All Ye Faithful etc.
There's a lot more but I'm stopping here -- if you're a citizen of the US and don't know/haven't heard any of these you have to be either extremely young or extremely old.