However, Billboard actively discourages full-on rerecordings of songs in a bid to win multi-format airplay. They actually had to make a rule about five years ago, informally called the "J. Lo rule," inspired by all the so-called "remixes" of Lopez's songs that were actually full-blown rerecordings at different tempos with guest rappers and new lyrics: cf. "I'm Real," "Ain't It Funny," etc. Before the rule, the dirty trick of such rerecordings was that labels were basically getting one super-sized chart position out of two completely different recordings. Now, if it's blatantly obvious that the vocal and the backing track and the beat have been redone from scratch, it charts separately.