Chicago- The Chicago Air and Water Show attracts a lot of business to the city, but this is a new one on police.

A “porn star” who turns 49 next month apparently timed a visit to Chicago to coincide with the show, and was arrested after she unwittingly arranged with an undercover officer to perform oral sex for $1,000 at a downtown hotel, police said.

Nicole M. Hamrah was charged with prostitution and is to appear Sept. 27 in Branch 43 court, officers said. She posted her planned visit to Chicago for the Air and Water Show on the Internet, investigators said.

“She was on her farewell tour,” one officer joked. “She’ll be in Branson, Mo., shortly.”

Hamrah, of Las Vegas, may not be on the A-list of porn stars, but her videos are in stores, said Cmdr. David Sobczyk of the Chicago Police Vice Control Section. He refused to divulge her showbiz name, saying he didn’t want to help drum up customers.

“According to her, she was a recent guest on the Howard Stern show,” Sobczyk said.

Hamrah, who was arrested Aug. 23, advertises herself as a “sexy porn star escort” in New York City, Barcelona and the United Kingdom, Sobczyk said.

“She actually autographed one of her DVDs for the arresting officer before she realized he was a police officer,” said Central District Capt. Joseph Vaclavik.

Authorities weren’t surprised at her age. “In today’s world, 48 is not what 48 was,” one said.