Miley Cyrus vs. Selena Gomez - It's Getting Catty!

Claws out! After Selena Gomez won Favorite International Artist at the MuchMusic Video Awards on Sunday night, Miley Cyrus tweeted a thinly-veiled accusation that the results were rigged. "Wigged woting wis wack wust wayin," she tweeted. (Presumably, that translates to "Rigged voting is wack just sayin.") Before the show, Miley had actively encouraged fans on Twitter to vote for her in the fan-voted category. This isn't the first time she's lashed out at Gomez. Just last week, the 21-year-old pop star performed her angry anthem "FU" to a cardboard cutout of Selena Gomez in concert.