This is the ending of the 2008 South Park episode "Britney’s New Look" where it was revealed Ms. Spears was selected by lottery to become a celebrity, only to be destroyed by fame so her sacrificed blood could be used to satisfy agriculture demons and lead to bountiful crops:
Sheila: Hey Sharon, Randy, great harvest, huh?
Randy: An incredible harvest. Some of the best corn I've seen in years.
Jimbo: Hey, check it out!
ET Reporter: She's the daughter of a country singer, and the young girl has really taken the country by storm. Hannah Montana's Miley Cyrus, though only fifteen years old, is already on her way to being a major superstar.
Randy: Looks like next harvest will be even better.
I must add I find it amusing that cable news is so shocked by Miley's bump and grind dance with an adult male (who, incidentally, is a gay man who wouldn't be slightly aroused by Cyrus, though Justin Bieber might give him a boner) that they repeatedly show it in super slo-mo to emphasize just how offensive it is...