Looks like Britney Spears can’t get enough of that wheelbarrow-style sex from music producer JR Rotem — the pair was spotted last night entering the Viceroy hotel around 2:30 am, later emerging after 3 hours of sex to hit up a local McDonald’s. It’s been reported that Britney ordered the #3 meal. Click inside for a bonus video of your favorite washed-up pop star enjoying Mexican just hours prior to getting done in the butt.