Katy Perry Exposed Underwear Onstage at BBC Radio 1's Big Weekend 2017

Katy Perry got pretty racy onstage at BBC Radio 1's Big Weekend 2017 televised music festival Saturday.

The pop songstress, who wore a sparkling silver mini dress, flashed her white underwear onstage while squatting during her performance. And speaking of squatting, Perry also got pretty blunt while showing some empathy towards many concertgoers struggling with an unfortunate side-effect of attending a concert.

"Some of you have to pee, right? I know I know I know. I wear sometimes awful contraptions that don’t let me use the restroom. So I know how you feel," she said. "But it is all about the music and that is why we are holding in everything." 

Perry then got somber and dedicated an acoustic version of her song "Part of Me" to the victims of last week's Manchester attack. A suicide bomber had killed 22 people, including children, at the city's stadium after an Ariana Grande concert.

"I think that you guys are beautiful and I think that we are all extremely brave and we are all in this together, are we not?" Perry said. "And you know what? We will still dance, we will still sing, we will still make music. This next one goes out to Manchester and to all the people that know what it means to love music and be a community because of it."

"If you have not touched the person to our right or left just do that. Just a little connection," she added. "Social media cannot do that, can it? This is a part of us that they will never take away from us. Rest in peace, Manchester."