Wasn't 'Brtiney' Webber's pet name for Rosberg when the two were together at Williams?
Yeah. There's a story that during a race in 05 or 06, whenever it was when Rosberg and Webber were team mates at Williams, early in a race both drivers damaged their cars and were both going to pit on the same lap. But Webber was pushing Rosberg, trying to pass him so he can pit first, which then led to Rosberg crashing because he was driving faster than he should have (in his damaged car) in order to keep Webber behind him. A call came over the radio telling Webber that Rosberg had track position and was pitting first. Then Webber replied, "Not any more, mate, Britney's in the wall."
So from that radio transmission, word is that the nickname of Britney then spread among the teams in the paddock and it stuck. Obviously Webber was taking the piss out of him for being a GQ kind of metrosexual guy who had a strong resemblance to Britney Spears.
Actually leads to the question of nicknames, good or bad, of drivers and other F1 characters. I wonder how many nicknames there are out there? I'm not familiar with any, to be honest, except for Nico "Britney" Rosberg.