Britney Spears - in "Shape" June 2013: Dieting Is Tough

Britney Spears is showing off her perfectly toned bod on the cover of Shape magazine's June 2013 issue.

The "Toxic" singer sizzles in a white hot bikini for the front page shot while opening up about her struggles with working out and keeping up with her diets.

Check out a few highlights of Miss Spears' interview below. For more, be sure to visit Shape!

On sticking to her diet:
"Dieting is tough... because my specialties are spaghetti, brownies, and chocolate chip cookies. I try not to make those too often or I'll eat the whole bowl of dough."

On maintaining her amazing physique:
"I like it, then again, I hate it. I'm in my 30's now, so I have to work harder to keep it up. I'm doing 90 minutes of yoga twice a week in addition to a lot of cardio- hour- long sessions three times a week with my trainer Tony Martinez. The [Vegas] performances won't be simple - they'll be a massive party from start to finish. And to pull this off, I have to be in top condition and running at full speed."