It probably wasn't sped up... Everyone kept saying the radio, studio, and music video versions of Stronger had different speeds but they were all the same lol. Things just sound different in different contexts. The tempo to DS is quite fast, it's only a few beats slower than WDKY.
really? I hear all songs on radio and almost all of the songs that I listen always or my faves dont have noticeable difference on speed especially Kelly's. I would know because I listen always to those songs, but if it is something noticeable then it might be something sped up much for it to be noticed.
I don't think anything's sped up but I just think it SOUNDS like it is when you hear it over the radio, maybe because you're excited that it's on the air or you're preoccupied (driving?) etc. But they don't usually speed anything up, well, not to my knowledge!