Sarah Palin must be a big fan of Jordin Sparks. Bristol Palin? Not so much.

At last night's MTV Music Awards, host Russell Brand made a few jokes at the expense of The Jonas Brothers. He wondered why they wear purity rings when - considering their age, popularity and looks - they could be having so much sex.

Sparks, also a purity ring wearer and well-known virgin, took exception to these swipes and said so before introducing T.I. to the crowd for a performance.

"I just have one thing to say about promise rings. It's not bad to wear a promise ring," Sparks said, "because not everybody – guy or girl – wants to be a slut."

Amen, Jordin! We admire her for speaking out on such a controversial subject.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.