This morning on Z100 (New York) and Y100 (Miami) several of the DJs mentioned "4 Minutes" and 2 of them admitted they had already HEARD the track. Both DJs had positive comments to make and noted that Timbaland does his usual "hey, hey/uhh, uhh" singing in it, but features primarily Justin Timberlake and Madonna.

Z100 is one of the most influential radio stations in the country as far as airplay is concerned.

Source: Drowned Madonna