Sienna Miller recently sported the same look but her jeans are far too long to be tucked in sandals. I def prefer the way Christina Milian looks like (and I prefer her LV sandals too).
I don't really like it . It looks like thier pants were too long but they wanted for people to see the shoes so they tucked the pants in. i would much rather wear a shorter pair of skinny jeans if thats the case