Former Disney foxes Selena Gomez, Miley Cyrus and Demi Lovato are all grown up now, and to prove their womanly status even more, each of the pop princesses has turned up their sex appeal by covering Cosmopolitan magazine this past year.

Sel took the March 2012 cover, Demi covered the June 2012 issue, and Miley's the most recent cover girl, posing for March 2013 issue.

While all of these magazine covers differ greatly, catering to each of these females' different personalities and styles, who do you think is the best Cosmo cover girl? Selena Gomez, Miley Cyrus or Demi Lovato?

For her Cosmo cover, 'Who Says' songstress Selena kept that sweet and sexy air about her. Donning a pink, flowing, beachy dress that shows off some cleavage, Gomez gives the camera a sultry stare as her brown, wavy locks blow in the wind. We love how much movement is on Selena's Cosmo cover, with the billowy fabric of her dress and windswept hair. Her makeup also looks fabulous, as usual, and her accompanying photo spread (which you can get a taste of below) delivers even more sex appeal in an age appropriate way.

Meanwhile, Miley Cyrus' cover absolutely oozes sexiness in a much more direct way. Cyrus loves showing off skin, and with a body like that, who wouldn't? The Pilates junkie is super fit and ridiculously hot, and her Cosmo cover reflects this. Hannah Montana is dead and buried, as Cyrus sheds her shirt, flashing her unbelievable abs and cleavage to the camera beneath her chic white pantsuit. Her red lips and bleached blond hair look fantastic, and her seductive stare has us all kinds of hot and bothered. Miley, frame this one for your boy Liam! And if you check out the pic below, you can see one of Miley's super cute and playful photos from inside the mag.

Then there's Demi Lovato, who seems to be reprising her role as Sunny on last June's cover of Cosmo. The 'Give Your Heart a Break' songstress kicked off the summer magazine season in a body-con, bright yellow zip dress that was very va-va-voom. Like her Disney pals, she's baring a bit of cleavage and flaunting her curvaceous figure. The cutouts on her dress are super hot and give another flash of her beautiful sun-kissed skin, and her hair looks flawless blowing in the wind. Lovato's smile is also a nice change, but she can throw out a "come hither" stare with the best of 'em, if you refer to her photo spread from inside the mag below.

Check out all of these Cosmo covers and accompanying pictures and vote Selena Gomez, Miley Cyrus or Demi Lovato for best Cosmo cover girl below!

Cosmopolitan (2)
Cosmopolitan (2)
Cosmopolitan (2)