By Real Simple
Updated September 23, 2009
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MMK Brands thong
Credit: John Lawton

This thong may be your new excuse to lay off the crunches. The scalloped control panel tames the lower abdomen without creating unsightly panty lines or spillover with body-hugging silhouettes. A mesh crotch keeps it comfortable.
To buy: $46, passportpanties.com.