[PICS] ‘Glee’ Season 5, Episode 4: ‘A Katy Or A Gaga’

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge watch a shearing demonstration as they visit the Sydney Royal Easter Show on April 18, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Chris Jackson/Getty Images)

Katy Perry & Madonna in 'V' magazine's Summer 2014 issue (Courtesy of Steven Klein/ V Magazine)

Katy Perry, Versace mansion, July 1, 2014 (Courtesy Of Instagram)

Katy Perry with her new green hair in Cosmopolitan, July 2014 (Courtesy of Matt Jones/Cosmopolitan)

Katy Perry (Courtesy of Peggy Sirota/GQ)

Katy Perry attends the 'Mademoiselle C' cocktail party at Pavillon Ledoyen on October 1, 2013 in Paris, France (Getty Images)

Katy Perry attends the Chanel show as part of the Paris Fashion Week Womenswear Spring/Summer 2014 at Grand Palais on October 1, 2013 in Paris, France. (Photo by Pascal Le Segretain/Entertainment/Getty Images)

Katy Perry attends the iHeartRadio Music Festival at the MGM Grand Garden Arena on September 20, 2013 in Las Vegas, Nevada. (Photo by David Becker/Entertainment/Getty Images for Clear Channel)

Katy Perry is seen outside 'Good Morning America' on September 6, 2013 in New York City. (Photo by Raymond Hall/FilmMagic)

Katy Perry attends the 2013 MTV Video Music Awards at the Barclays Center on August 25, 2013 in the Brooklyn borough of New York City. (Photo by Jamie McCarthy/Entertainment/Getty Images for MTV)

Katy Perry visits 'The Elvis Duran Z100 Morning Show' at Z100 Studio on August 12, 2013 in New York City. (Photo by Daniel Zuchnik/FilmMagic)

Katy Perry attends the premiere of Columbia Pictures' 'Smurfs 2' at Regency Village Theatre on July 28, 2013 in Westwood, California (Bauer-Griffin)

Katy Perry attends the Costume Institute Gala for the 'PUNK: Chaos to Couture' exhibition at the Metropolitan Museum of Art on May 6, 2013 in New York City. (Bauer-Griffin)

Katy Perry attends the the pre-Met Ball special screening of 'The Great Gatsby' after-party at The Top of The Standard on May 5, 2013 in New York City. (Photo by Rob Kim/Entertainment/Getty Images)

Katy Perry attends the 2013 Delete Blood Cancer Gala at Cipriani Wall Street on May 1, 2013 in New York City. (Photo by Jerritt Clark/WireImage)

Katy Perry, wearing Prada, attends Catherine Martin And Miuccia Prada Dress Gatsby Opening Cocktail on April 30, 2013 in New York City. (Photo by Stefanie Keenan/Entertainment/Getty Images for Prada)

Katy Perry attends the White House Correspondents' Association Dinner at the Washington Hilton on April 27, 2013 in Washington, DC. (Photo by Dimitrios Kambouris/Entertainment/Getty Images)

Katy Perry attends 'The Smurfs 2' party at The 5th Annual Summer Of Sony at the Ritz Carlton Hotel on April 22, 2013 in Cancun, Mexico. (Photo by Christopher Polk/Entertainment/Getty Images for Sony Pictures)

Katy Perry attends 'The Smurfs 2' photo call at The 5th Annual Summer Of Sony at the Ritz Carlton Hotel on April 22, 2013 in Cancun, Mexico. (Photo by Christopher Polk/Entertainment/Getty Images for Sony Pictures)

Katy Perry attends LACOSTE L!VE 4th Annual Desert Pool Party on April 13, 2013 in Thermal, California. (Photo by Jonathan Leibson/Entertainment/Getty Images for LACOSTE)

Katy Perry (Bauer-Griffin)

Katy Perry arrives at the 55th Annual GRAMMY Awards at Staples Center on February 10, 2013 in Los Angeles, California. (Photo by Jason Merritt/Entertainment/Getty Images)

Katy Perry arrives at Clive Davis & The Recording Academy's 2013 Pre-GRAMMY Gala and Salute to Industry Icons honoring Antonio 'L.A.' Reid at The Beverly Hilton Hotel on February 9, 2013 in Beverly Hills, California. (Photo by Jason Merritt/Entertainment/Getty Images)

Katy Perry arrives at he 2013 MusiCares Person Of The Year Gala Honoring Bruce Springsteen at Los Angeles Convention Center on February 8, 2013 in Los Angeles, California. (Photo by Jason Kempin/Entertainment/Getty Images)

Katy Perry backstage during 2013 People's Choice Awards at Nokia Theatre L.A. Live on January 9, 2013 in Los Angeles, California. (Photo by Kevin Mazur/WireImage)