This Singers Sanitary Pad Drops As She sings On Live TV

One question here please. Did she not wear panties? Or is this just for show?
Mexican singer Patricia Navidad, had the most embarrassing moment any woman can have, as she performed on live TV. Her sanitary pad is seen tumbling to the ground as she performed 'viva mexico' on Univision Despeirta America (meaning wake up america).  See the video obtained by TMZ after the cut...

I don't know how this would happen unless she stupidly didn't wear panties.
It might even be staged to get publicity. Nothing is above anyone.