I can tell you that it's definitely not pain-free. I had a c-section for medical reasons but the recovery can be pretty painful. Not to mention that it is a MAJOR surgery so there are risks for mom and baby during the procedure and for mom after the procedure. A c-section CAN be safer for baby and mom if there are medical issues, as was the case for me. But in general, a vaginal birth is *usually* the safest choice.
The rumor in Hollywood and other elite circles (maybe also in regular people's lives too) is that some choose c-section and have a tummy tuck too. Maybe some want to maintain their vagina/bladder...I'm not sure. I am also curious as to why anyone would choose a major surgery over a vaginal birth if there is no risk or medical reason to do so, but it's a personal decision that every woman has the right to make
eta: as far as Victoria Beckham goes, if she had the first c-section for medical reasons (even if not), I believe that it can be dangerous or risky to have a vaginal birth for subsequent births. I know it can be done (VBAC - vaginal birth after c-section) but I know it's not recommended for everyone).