Sexy singer Christina Aguilera has recorded her own private party anthem but she'll never release the rude tune. The DIRRTY singer and producer pal Linda Perry recorded saucy track F**K YOU, SUCK YOU while they were recording her last album Back to Basics, but Aguilera refused to add it to the project - because it was so naughty. Instead, she turns it up at home when she's hosting parties. She tells America's Maxim magazine, "We recorded it one night over whisky at the studio... I play it when I have my dancer friends over, when we've had one too many and start rolling around on the floor with each other."