Miley Cyrus don't know about Sports bras

Look at this picture we found of Miley Cyrus and her underwear clad boy toy. While I applaud these two for taking to the pavement to better their cardiovascular health, I am concerned about Miley's so-called workout attire.
Is that a bathing suit top she's wearing? You'll be sorry, Miley. One day when you're old and grey and your boobs are down to your knees, you'll rue the day you ever ran around half-naked with your flavor of the week in a poorly constructed, flimsy triangle top bathing suit.