Katy Perry Wears Mask Disguise Ahead Of Rock In Rio With Rihanna

Singer goes incognito in Brazil...

September 23, 2011 by Jason Gregory | Photo by Splash News/WENN.com

Katy Perry attempted to go under cover as she prepared to play Rock In Rio in Brazil today (September 23).

The singer was spotted arriving at the South American event wearing a mask, which covered half of her face, and later sound-checked on the main stage.

Perry is one of a host of names set to play the opening day of this year's festival, with Rihanna and Sir Elton John also on the bill.

Katy Perry see spoting a disguise as she arrives to sound-check at Rock In Rio.

Coldplay, Metallica and Guns N' Roses will also perform over the coming seven days.

Meanwhile, Perry is set to return to Britain this autumn to play the second UK leg of her California Dreams world tour.

Tickets are on sale now. For more details and to buy Katy Perry tickets, check out Gigwise Gig Tickets.