Credit: Getty Images Photo: Miley Cyrus and Liam Hemsworth at the 2012 People’s Choice Awards

Former Disney princess (and current 19-year-old) Miley Cyrus is on a mission to prove that she’s grown up and eager to put her Hannah Montana days behind her.

Case in point: Miley was recently spotted having fun (maybe a little too much fun) with a penis-shaped cake. The cake in question was intended for Miley’s beau Liam Hemsworth’s birthday celebration. But judging by these photos obtained by TMZ, it was Miley who was especially fond of the penis pastry.

The pictures show a playful Miley pretending to take a little nibble out of the dirty delicacy, and, in other photos, the "Party in the U.S.A.” songstress can be seen dancing on a banquet in a sexy black dress. We're guessing it's in celebration of Liam's birth, not the cake's unveiling.

Somewhere, Miley’s pop, Billy Ray Cyrus, is weeping, clutching his achy-breaky heart.

Source: TMZ