vmlemon on Repetitive pop songs 'more likely to be hits'; For each repetition of the chorus, a song’s likelihood of making it to number one increases significantly, according to researchers who analysed more than 2,400 songs released over 50 years - http://www.reddit.com/r...
"2 Unlimited had this nailed, with their "No Lyrics", erm "No Limit". Not sure if they tried to calculate the optimal number of times to include the word "No", though..." - Tyson Key