Hate to say it, because I can't stand her ............. BUT
J.Lo jeans are GREAT for "curvy" women. They are strechy and hug the butt like nothing else. They are usually low-riding, which some people hate, but they don't cause my butt crack to hang out (which Old Navy jeans do to me). I really like them.
Old Navy is good, but again, my butt hangs out of many of their jeans.
I have some Express jeans that I LOVE, they fit awesome.
I always stick with jeans with stretch in them. Otherwise I will NEVER get my thighs i nthem!