Katy Perry performed for a packed crowd in New York City's Rockefeller Center as part of The Today Show's Summer Concert Series on Friday, July 24.
Roger Wong/INFphoto.com
Visit msnbc.com for Breaking News, World News, and News about the Economy
Hot N' Cold
Visit msnbc.com for Breaking News, World News, and News about the Economy
Katy Perry performs "Waking Up In Vegas" on TODAY.
Visit msnbc.com for