Katy Perry's 'American Idol' finale look divides fans: 'Is she at a swim ...

Fans are “Hot N Cold” over this bold outfit. 

Katy Perry has had a headlines-making “American Idol” season – and she ended it with fireworks when she showed off a sheer look at the finale that divided fans. 

On Sunday night, the “Dark Horse” singer wore a Giuseppe Di Morabito orange set, with a sheer crop top with cut-outs and roses ($1,243) and the matching crystal-embellished mesh maxi skirt ($701). 

The sherbet set she donned for the live show proved controversial on social media. 

“Is she at a swim meet?” one “American Idol” viewer asked on Twitter. 

“That dress is not flattering on Katy Perry!” another viewer tweeted. “I’m not sure who picked that red outfit for you tonight, but it’s not flattering at all!” one “Idol” fan tweeted in agreement.

Katy Perry’s bright orange maxi skirt and crop top divided “American Idol” viewers.ABC via Getty Images She sparkled in the sexy look the three-hour live show.ABC via Getty Images The pop singer has had a controversial season as an “American Idol” judge.ABC via Getty Images

Perry quipped on Instagram, “orange u glad it was a great #idolfinale?”

Her husband Orlando Bloom weighed in with his support, as he dropped an orange emoji and a fire emoji. 

Other fans also adored the barely there ensemble, with makeup guru James Charles calling the 38-year-old pop star “Beautiful.” 

“Serve after server. They just keep coming,” one follower raved. 

The “Roar” singer took a brief leave of absence from the reality singing show.ABC via Getty Images Perry stunned in a gold gown to perform at the coronation of King Charles III.Getty Images

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Another asked, “orange you glad it’s over?” as Perry has had a contentious run as an Idol judge. 

Perry temporarily left the reality singing show after she faced backlash over some of her comments about contestants. Ed Sheeran and Alanis Morissette filled in while she was in England performing at King Charles III’s coronation with co-judge Lionel Richie on May 6. 

The “Hot n Cold” songstress had a glamorous time abroad – she performed at Windsor Castle for King Charles III’s coronation concert in a custom metallic Vivienne Westwood gown and wowed in a lavender suit by the same designer during the daytime festivities.