Katy Perry is all set to perform 'Birthday' live at the Billboard Music Awards on Sunday night, while on her Prismatic World Tour. No She's not jet-setting, she'll be in Glasgow, Scotland performing via satellite.

She gave us a taste of what to expect via instagram earlier this week.

Katy’s is up for an award in ten BBMA categories this year, including top artist and top Hot 100 song. Are you excited to see Katy in her 'Birthday Suit?'