HERE'S THE PICTURES [spoiler][img]http://l.yimg.com/k/omg/us/img/1408_4a6a64be9ab40453b1775e34a8f5fcbd.jpg[/img] Jennifer Lopez in London, April 28, 2010. [img]http://l.yimg.com/k/omg/us/img/8038_b2869303b79d3307ac18a9bb42e0a771.jpg[/img] Rihanna in West Hollywood, July 19, 2010.[/spoiler] Back in April, J.Lo donned the Lanvin frock for the London premiere of her romantic comedy, "The Back-Up Plan." Accessorizing with a wide belt, Lanvin necklace, black Ferragamo heels, and a Jimmy Choo clutch, the actress topped off her look with a fab beehive inspired by the Lanvin models who walked the runway at the Paris Spring 2010 show. Lat Monday, Rihanna stepped out in the same one-shoulder gown for a dinner at AGO in West Hollywood. Still rocking her signature fire engine red locks, the "Run This Town" singer kept her look simple with nude heels, a narrow belt, and barely any makeup. Besides the fact that this dress conjured up fond memories of Jacobim Mugatu's "Derelicte" fashion line in "Zoolander," the gown looks amazing on both ladies. I love that Ms. Lopez had the confidence to rock that cool, retro hairstyle as it lends her an old-school Hollywood vibe, and her figure-flattering belt accentuates her curves in all the right places. Rihanna dressed down her gown to perfection for a Monday night out on the town. Love that she kept it low-key. The only drawback with the "Rude Boy" diva's outfit is that her narrow sash doesn't give quite the same hourglass definition as La Lopez's wide belt. So for me, Jenny from the Block wins this battle royale. Mugatu would be proud!