What major pre-2000 music hits have been successfully covered?

Eminem feat. Lil Wayne – No Love
[Original: Haddaway – What Is Love]

Armand Van Helden – You Don't Know Me
[Original: Carrie Lucas – Dance With U]

STFU – Thriller (Mouth 2 Mouth Remix)
[Original: Michael Jackson – Thriller]

Jukebox Killaz – Relight My Fire / or (High Voltage Remix)
[Original: Dan Hartman – Relight My Fire]

Hi-Tack – Say Say Say
 [Original: Michael Jackson – Say Say Say]

Eric Prydz – Call On Me
[Original: Steve Winwood – Valerie]

That's just a few of them.

How did The xx remix of "You've Got the Love" Florence +   the Machine come about?

I'm not sure if the timing works out, but they were on tour together in the UK in Sept. 2009. http://florenceandthemachine.blo…. From what I heard, the F+TM audience weren't as interested in the more mellow the xx.
http://stereogum.com/archives/ph…

What are some of the best 90's hip hop song remixes?

my top 5: 

5. AZ – Sugar Hill (Remix) 

this remix is so chilled, it's like laying back on a hammock with a cold beer. 

4. LL Cool J – I Shot Ya [Remix] ft Keith Murray, Prodigy, Fat Joe & Foxy Brown 

one of the hardest posse cuts ever! 

3. Public Enemy – Shut 'Em Down (Pete Rock Remix) 

the Pete Rock version retains the original's grittiness but also adds those undeniable Pete Rock horns. one of his signature tracks 

2. Raekwon – Can It Be All So Simple [Remix] (feat. Ghostface Killah)

expansion on the original. Rae and Ghost go harder than they did on the first.  

1. Craig Mack – Flava in Ya Ear (Remix) ft. Notorious B.I.G. Rampage LL Cool J & Busta Rhymes 

Big and Busta kill the beginning and ending. Could have done without Rampage, but oh well. Thank god they left the beat intact because it's sick.