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Jordin Sparks

"I just have one thing to say about promise rings. It's not bad to wear a promise ring, because not everybody -- guy or girl -- wants to be a slut," Jordan Sparks passionately proclaimed during the VMAs. She was responding to Russell Brand, the host of this year's VMAs, who poked fun at the Jonas Brothers for wearing purity rings, which are a symbol of promise to remain virgins until marriage.

Abstinence advocacy groups like "True Love Waits" and "Silver Ring Thing" preach the importance of waiting to have sex.

Joe Jonas, who also wears the ring, says to Details magazine that he and his brothers view the rings as "promises to ourselves and to God that we'll stay pure till marriage."

What do you think? Are purity rings effective?

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