Britney Spears insisted on changing into comfortable footwear whenever she filmed close-ups for her new video 'Till The World Ends - because she couldn't stand the pain of dancing in high heels.
The Toxic superstar gets sexy in the promo for her latest single, strutting her stuff in a studded black leather jacket, black bodysuit and matching stilettos.
But Spears struggled to stay in costume throughout the long shoot and slipped her feet into her cushioned Ugg boots whenever she could to rest her sore feet.
In MTV special, Britney Spears: I Am the Femme Fatale, she says, "It (dancing in heels) hurts, but it looks good. It wasn't a full-length shot so a girl's about comfort when it's not showing!"
Her shoe discomfort wasn't the only complaint Spears had onset - the underground, post-apocalypse-style shoot got a little too dirty for the singer.
She adds, "The set was a little much. It was grimy and it was gross and it felt like there was poop everywhere when there really wasn't, it was just sweat everywhere. It was disgusting sometimes. It was a bit much, yeah. (But) I tough it out... It was fun, it was a lot of fun."
The TV special aired in the U.S. on Sunday (03Apr11).
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