Down with the crowd: Katy Perry showed her fans a little more than they bargained for as she took to the stage at the Hollywood Bowl
Kn-ellie-ng: Miss Goulding was quite literally singing from her toes at the charity concert
Standing straight: Ellie and Katy during a meet-and-great for a radio station before the concert began
Silver bird: Katy went for a bright choice of outfit wearing a silver jacket over a skirt and top-combo in the same material, paired with knee-high socks
How high? There was no mistaking Miss Perry’s energy on stage at the Hollywood Bowl
Strictly retro: Katy completed her 90s inspired outfit with a ponytail on top of her head
Listen up: Resembling a futuristic schoolgirl, Katy Perry took in everything her support had to say
Jump around: You could certainly hear Katy Perry ‘Roar’ as she took over the stage on Wednesday night
Pride of Britain: Ellie was not one to be outdone by Miss Perry, as she belted out her finest hits
Girl power: Ellie and Katy were joined on stage by Bonnie McKee, Sara Bareilles, Tegan and Sara, and Kacey Musgraves to sing her hit Roar
Katy fan: Jessica Alba attended the show dressed in a train conductor style hat and a yellow sweater
BFF: Katy Perry’s best friend Bonnie McKee, who co-wrote many of her biggest hist include Roar and California Girls, also sang for charity
Sweet tones: Country star Kacey Musgraves performed songs form her third album Same Trailer, Different Park
