Last week, Rihanna’s latest single Work topped the Billboard Hot 100, giving her more Number 1 hits than Michael Jackson. She’s got 14 compared to MJ’s 13. Right now The Beatles have the most Number 1 hits with 20.Elvis and Mariah Carey are close behind with 18. Given that Rihanna is only 28, we’re betting she’ll break 18 Number 1 hits in the next few years. We wouldn’t even be surprised if she broke 20. But she’s going to have to Work for it.