Back of Katy Legs It Around LA After a Tiff With Kara on American Idol Katy Perry left little to the imagination yesterday when she headed into an LA dance studio wearing a leotard and lace leggings. She was more covered up today, though, for her latest visit to her trainer's house. Katy went with a bold red number for her appearance last night on American Idol, where she went head-to-head with Kara DioGuardi over a few of the contestants and even threatened to toss a glass of Coke! Hopefully Katy minds her manners at Sunday's Grammy Awards, where she may debut an interesting acceptance speech if she wins Best Female Pop Vocal for her song "Hot N Cold." View 10 Photos › Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 To see more Katy, just . View 10 Photos › Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 Photo 7 Photo 8 Photo 9 Photo 10 Comments dana-stewart 7 years i like how she judging the contestants on American idol. But what did she wearing on that photo, it's a shame! jaan_black 7 years she has a hot body BBBianca 7 years But I guess that's what I love about her. She takes things into her own perspective and is really upfront about her opinions. theglossarie 7 years i did not like her as a guest idol judge. i appreciate her take on things but she was acting like she owned the place! babyshakes 7 years Katy Perry really looks like Emily Blunt.