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Rihanna re-emerges at ‘Battleship’ premiere after medical treatment

Earlier this week, she was treated for 'exhaustion' with an IV. Th star says she had the flu.

Earlier this week, she was treated for ‘exhaustion’ with an IV. Th star says she had the flu. (Kevork Djansezian/WireImage)

Rihanna made her first appearance last night since being treated for “the flu” with an IV earlier this week. Walking the blue carpet at the Los Angeles premiere of her film “Battleship,” Rihanna refuted reports that her medical emergency had been caused by excessive partying, instead saying that she had “the flu.”

Rihanna arrived at the Nokia Theatre wearing what looked like the stripper version of a dress Kate Middleton wowed in early this week. With a halter top and a cowl neck down to her belly button, as well as a thigh-high slit, the white dress revealed a high percentage of the “Umbrella” singer’s body.

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“I’ve gotta hold on to my outfit a little tighter than usual,” she joked to “Access Hollywood.”

The star also spoke to the show about her medical treatment following the Met Costume Institute Gala in New York Monday night.

“I’m a lot better now… I had a couple days to rest and get rehydrated,” she said. “I just had the flu and I kept working and I wasn’t getting better so I took couple days off to sleep and I feel great.”

While Rihanna held that she was just under the weather earlier this week, reports have said that the star was partying overtime. Sources said that the singer had been drinking and smoking more than usual, one alleging that she was “going wild.” Before her appearance on “Saturday Night Live” this weekend, Rihanna opted out of a dress rehearsal, Lorne Michaels telling The Post that this was a first for a musical guest in the history of the 37-year-old show.

Still, Rihanna appeared in good spirits at the “Battleship” premiere. The film marks her acting debut.

“After I started doing videos, [acting] felt like something that I would be interested in,” she told “Access Hollywood.” “I didn’t know if I was gonna be any good or like it. But I tried it thanks to Peter Berg and Universal and it has been really tremendous, this experience.”