Pop star Lily Allen admitted she had sex with someone her friend had a celebrity crush on, and said she had no regrets. She confessed to doing the deed during Monday’s episode of her podcast, “Miss Me,” which she co-hosts with her best friend, Miquita Oliver. The 39-year-old singer said she deliberately got down and dirty with someone she knew Oliver was interested in, and she was quick to justify her actions. “I fancied him, so I was getting mine,” Allen said. “By the way, I think pop stars are fair game, like, I don’t care.” NEW YORK, NEW YORK – JUNE 13: Lily Allen attends the 2022 Tribeca F…