Katy Perry Bares Midriff in Shimmering Outfit at Radio 1's Big Weekend!

Katy Perry keeps it fierce while performing live at Radio 1′s Big Weekend at Glasgow Green on Sunday (May 25) in Glasgow, Scotland. “Woke up from my nap via bagpipe player out my window. I must be in Glasgow… #radio1bigweekend,” the 29-year-old entertainer tweeted earlier in the day. PHOTOS: Check out the latest pics of