The “American Idol” deal that Benny Medina made for Jennifer Lopez has paid off in buckets of gold. Lopez’s new highly auto-tuned single, “On the Floor,” which had a video debut on “Idol” this week, has hit number 1 on ITunes. The music is produced by Red One, the same guy who’s made Lady GaGa a sensation. RedOne didn’t come cheap, but he was the right choice. Lopez’s music career had pretty much nosedived a couple of years ago with the single “Get Right” with its god awful off key horn sample from an unreleased Usher record. By 2009 she was singing about her shoes in “Louboutins.” Things looked bleak, and Columbia Records said goodbye. But all is changed now with her $12 million deal. Next, I guess, will be an album. More importantly, RedOne is also producing a new album right now for Lopez’s very talented husband, Marc Anthony. It will be his first English language record in 12 years.