Let's say you are a faded pop star more famous these days for shaving your head and making out with college boys in hotel hot tubs than recording hit singles. Let's also say the biggest pop star on the planet at the moment wrote a song just for you, and he plans to sing it with you, and the world's biggest pop music producer at the moment wants to lend his talents to the project as well. What do you do? If you're Britney Spears, you initially say, "Hells yes!", then back out of a recording session with Justin Timberlake and Timbaland at the last minute, according to New York Post's Page 6. Exactly what you would have done, right? P.S. Page 6 makes an offhand reference to Britney being bipolar. Did Britney being bipolar somehow become common knowledge at some point?