i love Rihanna as much if not more than the next guy. I've been a fan since A Girl Like Me loved that album. But saying that RIhanna has a powerhouse voice is just ridiculous i have not heard Rihanna belt out the high notes she has a pleasant voice but she aint no Mariah. At hear peak she can't rival Jlo in her peak. The woman at a point in time was the most talked about Celebrity. No 1 single, album and movie at the same time RiRi can never do that. Besides JLO can still out perform Rihanna anyday she should only be so lucky to be compared to JLO.