Katy Perry arrives at MOCA's 35th Anniversary Gala presented by Louis Vuitton at The Geffen Contemporary at MOCA on Saturday, March 29, 2014 in Los Angeles. (Photo by Annie I. Bang /Invision/AP

Katy Perry - Manchester Evening News

Katy Perry arrives at MOCA's 35th Anniversary Gala presented by Louis Vuitton at The Geffen Contemporary at MOCA on Saturday, March 29, 2014 in Los Angeles. (Photo by Annie I. Bang /Invision/AP

Singer Katy Perry attends MOCA's 35th Anniversary Gala presented by News Photo - Getty Images

Katy Perry arrives at MOCA's 35th Anniversary Gala presented by Louis Vuitton at The Geffen Contemporary at MOCA on Saturday, March 29, 2014 in Los Angeles. (Photo by Annie I. Bang /Invision/AP

Singer Katy Perry attends MOCA's 35th Anniversary Gala presented by News Photo - Getty Images

Katy Perry arrives at MOCA's 35th Anniversary Gala presented by Louis Vuitton at The Geffen Contemporary at MOCA on Saturday, March 29, 2014 in Los Angeles. (Photo by Annie I. Bang /Invision/AP

MOCA Celebrates Its 35th Anniversary

Katy Perry arrives at MOCA's 35th Anniversary Gala presented by Louis Vuitton at The Geffen Contemporary at MOCA on Saturday, March 29, 2014 in Los Angeles. (Photo by Annie I. Bang /Invision/AP

Katy Perry - Manchester Evening News

Katy Perry arrives at MOCA's 35th Anniversary Gala presented by Louis Vuitton at The Geffen Contemporary at MOCA on Saturday, March 29, 2014 in Los Angeles. (Photo by Annie I. Bang /Invision/AP

Katy Perry Wore Louis Vuitton @ The Opening of the 'Academy Museum of Motion Pictures' in Los Angeles

Katy Perry arrives at MOCA's 35th Anniversary Gala presented by Louis Vuitton at The Geffen Contemporary at MOCA on Saturday, March 29, 2014 in Los Angeles. (Photo by Annie I. Bang /Invision/AP

Singer Katy Perry attends MOCA's 35th Anniversary Gala presented by News Photo - Getty Images

Katy Perry arrives at MOCA's 35th Anniversary Gala presented by Louis Vuitton at The Geffen Contemporary at MOCA on Saturday, March 29, 2014 in Los Angeles. (Photo by Annie I. Bang /Invision/AP

Last Night's Parties: Katy Perry, Chloe Sevigny, Pharrell Attend MOCA's 35th Anniversary Gala, Mark Wahlberg, Ariana Grande Hit The Kids' Choice Awards & More

Katy Perry arrives at MOCA's 35th Anniversary Gala presented by Louis Vuitton at The Geffen Contemporary at MOCA on Saturday, March 29, 2014 in Los Angeles. (Photo by Annie I. Bang /Invision/AP

Last Night's Parties: Katy Perry, Chloe Sevigny, Pharrell Attend MOCA's 35th Anniversary Gala, Mark Wahlberg, Ariana Grande Hit The Kids' Choice Awards & More