As much as I love Rihanna, there's only ONE RULE : if you need more than 3 leaked songs to promote an album, it will NOT be a huge success.
None of the 3 songs (russian roulette, hard, wait is ova) are as HUGE as an "umbrella" or "don't stop the music".
umbrella and dstm are considered CATCHY songs. i dont know why rihanna didnt do catchy songs. rr, hard and wait is ova are not CATCHY material. in other words, it seems she is going against the grain.